at7601fg AME, Inc., at7601fg Datasheet - Page 25

• Manufacturer Part Number: at7601fg
• Description: Printer Port Controller
• Manufacturer: AME, Inc.

Rev. B.02
AT7601F
6-1 Configuration Register Description
CR20 CHIP ID REGISTER 1(Default 0x76)
CR21 CHIP ID REGISTER 2(Default 0x01)
CRF0 MODE CONTROL REGISTER (Default 0x3F)
Bit 7: Parallel Port Interrupt Type
Bit 6-3: ECP FIFO Threshold.
Bit 2-0: Parallel Port Mode (Default 111)
CRF1 ECP IRQ/DRQ CHANNEL SELECT REGISTER (Default 0x31)
Bit 7-6: Reserved.
Bit 5-4: ECP DRQ Channel Select. These two bits reflect to ECP Extended Control Register bit 1-0.
Bit 2-0: ECP IRQ Channel Select. These three bits reflect to ECP Extended Control Register bit 5-3.
= 0 Parallel Port Interrupt follows ACK# when Parallel Port is in EPP mode or Printer Mode, SPP Mode, or
This register is read-only.
This register is read-only.
This bit is valid except Parallel Port Mode is set in Printer Mode(Bit[2:0]=100), os Standard& Bi-directional
Mode(Bit[2:0]=000).
= 1 Pulsed low, released to high-Z.
EPP mode under ECP mode.
= 00 No DMA.
= 100 Printer Mode
= 000 Standard and Bi-direction (SPP) mode
= 001 EPP - 1.9 and SPP mode
= 101 EPP - 1.7 and SPP mode
= 010 ECP mode
= 011 ECP and EPP - 1.9 mode
= 111 ECP and EPP - 1.7 mode.
= 01 DRQ 1.
= 10 DRQ 2.
= 11 DRQ 3.
= 000 All others.
= 001 IRQ 7.
= 010 IRQ 9.
= 011 IRQ 10.
= 100 IRQ 11
= 101 IRQ 14.
= 110 IRQ 15.
= 111 IRQ 5.
AME, Inc.
Printer Port Controller
25