Large differences between new and earlier version. For more details on components, find hardware comparison table below.
Identical PCB layout which can be used for Desktop and Keyboard. Desktop version comes with several unpopulated pads.
Main additions on PCB for Keyboard version:
With each board revision there is chance of minor or bigger changes in circuitry, components or board layout. Even when comparing devices with exactly the same revision (i.e. my own devices against data from the internet), there is a chance of having differences. This can be e.g. different memory sizes, different component manufacturers, clock ratings, temperature ratings, … . It might happen that your device is different from mine. So whenever possible I used data from the devices I personally own and refer to the exact board revisions.
Please note that since I don’t own a Q or Q Rack (or even a Q+) and cannot use it for reference. So the Q column is still incomplete. However, I included relevant datasheet information based on the components I could spot in Szymon Płotkowski’s Q Rack video. But the information below is incomplete. If you own such a device and would like to contribute, I would be very happy!
| microWAVE XT (MWMB31 / MWMB32) | Q Rack (QMB Rev.1.2) | microQ (MQMB12B + MQBP12) | nano (MMT V2.3) | Blofeld (BFMB V1.41) | Blofeld, Blofeld Keyboard (BFMB V2.04) | |
|---|---|---|---|---|---|---|
| DSP See DSP comparison table below for more details | 1x Motorola DSP56303 | Earlier Revisions: 3x Motorola DSP56303 Later Revisions: 3x Motorola DSP56362 | 1x Motorola DSPH56362 | 1x Freescale DSPB56731 | 1x Freescale DSPB56731 | 1x Freescale DSPB56731 |
| External DSP RAM See DSP comparison table below for more details | MWMB Rev. 3.1: 5x Samsung Electronics KM68V1002AJ-12 1 Mbit SRAM, 12 ns, 3.3 V MWMB Rev. 3.2: … | 6x Samsung Electronics KM68V1002AJ-12 1 Mbit SRAM, 12 ns, 3.3 V 3x Samsung Electronics KM48V2104CS-L6 2M x 8bit EDO DRAM, 60 ns, 3.3 V | 3x ISSI Technology GS72108J-10 2 Mbit SRAM, 10 ns, 3.3 V 44-pin TSOP (Type II) | n/a | n/a | n/a |
| Optional Expansion Board | yes 2 additional DSPs + RAM | yes 2 additional DSPs + RAM | yes 2 additional DSPs + RAM | n/a | n/a | n/a |
| Main MCU | Motorola MC68331CFC20 20 MHz, 32-bit microcontroller 132-pin PQFP | Motorola MC68331CFC20 20 MHz, 32-bit microcontroller 132-pin PQFP Later Revisions: Motorola MC68331CPV20 20 MHz, 32-bit microcontroller 144-pin TQFP | Motorola MC68331CPV20 20 MHz, 32-bit microcontroller 144-pin TQFP | n/a | Freescale MC9S12UF32PBE 16-bit HCS12 CPU 32 kB Flash, 3.5 kB RAM USB2.0 controller with 1.5 kB RAM buffer compatible with M68HC11 instruction set, interrupt stacking, and programmer’s model 64-pin LQFP | Freescale MC9S12UF32PUE 16-bit HCS12 CPU 32 kB Flash, 3.5 kB RAM USB2.0 controller with 1.5 kB RAM buffer compatible with M68HC11 instruction set, interrupt stacking, and programmer’s model 100-pin LQFP |
| External Main MCU RAM | Revision 3.1: 2x Samsung Electronics KM682757CJ-15 256 Kbit SRAM, 15 ns, 5 V Revision 3.2: … | 2x Samsung Electronics KM681000CLG‑5 128K x 8bit SRAM, 55 ns, 5 V | 2x Samsung Electronics K6X1008C2D-BF55 1 Mbit SRAM, 70 ns, 5 V 32-pin SOP | n/a | n/a | n/a |
| Non-volatile memory | 2x AMD 29F010-70PC (or compatible) 1 Mbit Flash Memory, 5 V, DIP-32 | 1x AMD AM29F400BB-70EC 4 Mbit Flash Memory, 5 V, 48-pin TSOP1 | 1x AMD AM29F400BB-90ED 4 Mbit Flash Memory, 5 V 48-pin TSOP1 | 1x Samsung Microelectronics K9F1208U0B 512 Mbit with spare 16 Mbit NAND Flash Memory 3.3 V, 48-pin TSOP1 1x ST Microelectronics M24256BWG 256 Kbit serial I²C bus EEPROM 3.3V, SOP8 | 1x Samsung Microelectronics K9F1208U0B 512 Mbit with spare 16 Mbit NAND Flash Memory 3.3 V, 48-pin TSOP1 | 1x Hynix HY27US08121B 512 Mbit with spare 16 Mbit NAND Flash Memory 3.3 V, 48-pin TSOP1 |
| Auxiliary MCU(s) | Front Panel: Microchip PIC16C73A 20 MHz, 8‑bit microcontroller 28-pin SDIP | Front Panel: 1x Microchip PIC16C73A 20 MHz, 8‑bit microcontroller 28-pin SDIP 1x Microchip PIC16C57-XT/SP 40 MHz, 8‑bit microcontroller 28-pin SDIP | n/a | n/a | n/a | Blofeld Keyboard only Freescale MC9S08GT8A |
| Sample Rate | 40 kHz | 48 kHz | 48 kHz | 44.1 kHz | 44.1 kHz | 44.1 kHz |
| Audio Outputs | 4 channels Main Out (stereo) Sub Out (stereo) | 6 channels Main Out (stereo, analog+SPDIF) Sub Out 1 (stereo) Sub Out 2 (stereo) | 6 channels Main Out (stereo) Sub Out 1 (stereo) Sub Out 2 (stereo) | 2 channels Main Out (stereo) | 2 channels Main Out (stereo) | 2 channels Main Out (stereo) |
| Audio Input | yes (XT and XTk only) | yes | yes | n/a | n/a | n/a |
| DAC | 2x Cirrus Logic/Crystal CS4390KS 2ch Delta Sigma DAC, 106 dB, 24-bit | 2x … 3x Cirrus Logic/Crystal CS4390KS? (tbc.) 2ch Delta Sigma DAC, 106 dB, 24-bit Later Revisions: 1x AKM AK4527VQ Multi-Channel Codec for ADC and DAC: 2ch Delta Sigma ADC, 102 dB, 24-bit 6ch Delta Sigma DAC, 106 dB, 24-bit | 1x AKM AK4527VQ Multi-Channel Codec for ADC and DAC: 2ch Delta Sigma ADC, 102 dB, 24-bit 6ch Delta Sigma DAC, 106 dB, 24-bit | 1x AKM AK4384VT 2ch Delta Sigma DAC, 106 dB, 192 kHz, 24-bit | 1x AKM AK4384ET 2ch Delta Sigma DAC, 106 dB, 192 kHz, 24-bit | 1x AKM AK4384VT 2ch Delta Sigma DAC, 106 dB, 192 kHz, 24-bit |
| ADC | 1x Cirrus Logic/Crystal CS5330AKS 2ch Delta Sigma ADC, 94 dB, 18-bit | 1x Cirrus Logic/Crystal CS5330AKS? (tbc.) 2ch Delta Sigma ADC, 94 dB, 18-bit Later Revisions: 1x AKM AK4527VQ Multi-Channel Codec for ADC and DAC: 2ch Delta Sigma ADC, 102 dB, 24-bit 6ch Delta Sigma DAC, 106 dB, 24-bit | Multi-Channel Codec for ADC and DAC (see above) | n/a | n/a | n/a |
| Digital Audio Transmitter | n/a | 1x Cirrus Logic/Crystal CS8402A-CS Monolithic Digital Audio InterfaceTransmitter, Supports: SPDIF, AES/EBU, and others Later Revisions: n/a? (tbc.) | n/a | n/a | n/a | n/a |
| Line Amplifier | NE5532 (one per stereo output) | NE5532 (one per stereo output) | 3x NE5532 (one per stereo output) 1x TL072 (stereo input) | 1x NE5532 (stereo output) | 1x NE5532 (stereo output) | 1x NE5532 (stereo output) |
| Headphone Amplifier | n/a | n/a | National Semiconductor LM8272MM (“A60”) Dual Rail-to-Rail IO Op Amp High Output Current Unlimited Cap Load | National Semiconductor LM1877M Monolithic Dual Power Amplifier 2x 2W (12V Supply, 8 Ohms Load), 70 dB SNR | National Semiconductor LM1877M Monolithic Dual Power Amplifier 2x 2W (12V Supply, 8 Ohms Load), 70 dB SNR | National Semiconductor LM1877M Monolithic Dual Power Amplifier 2x 2W (12V Supply, 8 Ohms Load), 70 dB SNR |
| Crystals / Clock Generators | Audio: 10.240 MHz (TCXO) MCU: tbd. Front Panel µC: 4.000 MHz (Crystal) | ? | Integrated Circuit Systems MK1420S OPL3, OPL4 + Codec Clock Source; 14.31818 MHz Crystal for MK1420s Audio Clock: 24.576 MHz, tbc. MCU Clock: ? | Audio: 11.2896 MHz (Crystal) | Audio: 11.289 MHz (Crystal) MCU: 12.000 MHz (Crystal) | Audio: 11.289 MHz (Crystal) MCU: 12.000 MHz (Crystal) |
| Power Management / Voltage Regulators | ST Microelectronics TL7705ACD Power-on Reset Generator | ? | 2x ON Semiconductor MC7805CT 5 V Linear Voltage Regulator ST Microelectronics LF33CV 3.3V Linear Very Low Drop Voltage Regulator ST Microelectronics 78L08 / 79L08 +8 V / –8 V Linear Voltage Regulators Texas Instruments TL7705AC Supply-Voltage Supervisor / Power-on Reset Generator | ON Semiconductor NCP5504G 3.3 V + 1.25 V, 250 mA Dual Output Low Drop Linear Regulator | ON Semiconductor 8M05DG 5 V Linear Voltage Regulator ON Semiconductor NCP5504G 3.3 V + 1.25 V, 250 mA Dual Output Low Drop Linear Regulator | ON Semiconductor 8M05DG 5 V Linear Voltage Regulator ON Semiconductor NCP5504G 3.3 V + 1.25 V, 250 mA Dual Output Low Drop Linear Regulator |
| Midi Input Optocoupler | Fairchild / ON Semiconductor H11L1 1 MHz Bandwidth, Schmitt Trigger Output | Earlier Revisions: Sharp Microelectronics PC900V 1 MHz Bandwidth, Schmitt Trigger Output Later Revisions: Fairchild / ON Semiconductor H11L1 1 MHz Bandwidth, Schmitt Trigger Output | Fairchild / ON Semiconductor H11L1 1 MHz Bandwidth, Schmitt Trigger Output | Fairchild / ON Semiconductor H11L1 1 MHz Bandwidth, Schmitt Trigger Output | Fairchild / ON Semiconductor H11L1 1 MHz Bandwidth, Schmitt Trigger Output | Fairchild / ON Semiconductor H11L1 1 MHz Bandwidth Schmitt Trigger Output |
| Motorola / Freescale DSP56303 / XC56303 | Motorola / Freescale DSP(H)56362VP100 / XCB56362PV100 | Freescale / NXP DSPB56731AF180 | |
|---|---|---|---|
| 24-bit digital signal processor | 24-bit digital signal processor | 24-bit digital signal processor | |
| Speed | 100 MMACS at 100 MHz | 100 MIPS at 100 MHz | 181 MIPS at 181 MHz |
| Voltage | 3.3 V core supply 3.3 V peripheral I/O supply | 3.3 V core supply 3.3 V peripheral I/O supply | 1.25 V core supply 3.3 V peripheral I/O supply |
| Package | 144-pin TQFP | 144-pin LQFP | 80-pin LQFP |
| On-chip RAM | P data RAM: – 2–4K x 24-bit words X data RAM: – 2–3K x 24-bit words Y data RAM: – 2–3K x 24-bit words User-configurable memory partitions | P data RAM: – 2–5K x 24-bit words X data RAM: – 5.5K x 24-bit words Y data RAM: – 3.5–5.5K x 24-bit words User-configurable memory partitions | P data RAM: – 4–44K x 24-bit words X data RAM: – 28–36K x 24-bit words Y data RAM: – 16–48K x 24-bit words User-configurable memory partitions |
| Off-chip RAM Expansion | External memory expansion port (24 data lines) P/X/Y data: – Up to 256K x 24-bit SRAM – Up to 16M x 24-bit DRAM | External memory expansion port (24 data lines) P/X/Y data: – Up to 256K x 24-bit SRAM – Up to 16M x 24-bit DRAM | n/a |
| Direct Memory Access | 6 DMA channels | 6 DMA channels | 6 DMA channels |
| Enhanced Serial Interface | 2x Enhanced Synchronous Serial Interface (ESSI0/ESSI1) | 1x Enhanced Serial Audio Interface (ESAI) | 2x Enhanced Serial Audio Interface (ESAI/ESAI_1) |
| Digital Audio Transmitter | n/a | Digital Audio Transmitter (DAX) | Digital Audio Transmitter (DAX) |
| Serial Interface | Serial Communication Interface (SCI) | Serial Host Interface (SHI): – SPI and I2C protocols – Multi master capability in SPI mode – Single master capability in I2C mode | Serial Host Interface (SHI): – SPI and I2C protocols – Single master capability in both SPI and I2C mode |
| Parallel Host Interface | Byte-wide parallel host interface (HDI08) with DMA support | Byte-wide parallel host interface (HDI08) with DMA support | n/a |
| Timer | Triple Timer module | Triple Timer module | Triple Timer module |
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