YTD436 Datasheet, PDF (3/14 Pages) YAMAHA CORPORATION – ISTC ISDN BRI controller with S/T ref. pt. analog D/R

3. Layer 3 interface function
• Connects to 8-bit or 16-bit microprocessor
(8086 family, 80186 family, 6800 family, 68000 family)
• Operates in one of two data transfer modes :
- DMA transfer mode (with the built-in 16-bit address DMA controller)
- I/O transfer mode (with the built-in FIFO)
• Primitive logical interface
4. B channel interface
• Data rate setting : 64 k, 56 k and 32 kbps
• Serial mode
- B channel I/O clock selection function
• Internal clock mode
Inputs/outputs the B channel data with 64 k, 56 k or 32 kHz internal clock
• External clock mode (PCM Highway mode)
Inputs/outputs the B channel data with a 128 k to 2048 kHz external clock
- B channel selection function
• Internal clock mode
Selects/switches B channel I/O pins
• External clock mode (PCM Highway mode)
Selects/switches B channel time slots
• Parallel mode
- LSB/MSB switching function
- Bit shift function
- Data transfer mode
• DMA transfer mode with the DMA request function
• I/O transfer mode with the built-in FIFO
5. Low-power operation
(Host processor clock control function, Powerdown mode)
6. High-performance CMOS technology
7. 100-pin SQFP
8. DigitalSupply Voltage (+5V or +3.3V ), Analog +5V supply
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