User guide

24 Registers
3.3 DO_CSR: DO Control & Status Register
Digital input control and status checking is done by this register.
Address: BASE + 04
Attribute: READ/WRITE
Data Format:
(2) This bit is different between Rev.A and Rev.B.
DO_32 (R/W)
X 0: Output port is not 32-bit wide ( 16-bit or 8-bit wide)
X 1: Output port is 32-bit wide, PORTA is configured as the
extension of PORTB. That means PORTB is output lines
(0…15), and PORTA is output lines (16…31). All PORTA
control signals are disabled.
DO_MODE (R/W)
X 00: use timer1 output as output clock
X 01: use 20MHz clock as output clock
X 10: use 10MHz clock as output clock
X 11: REQ/ACK handshaking mode
DO_WAIT_NAE (R/W)
X 0: do not wait output FIFO not almost empty flag
X 1: delay output data until FIFO is not almost empty
PAT_GEN(R/W)
X 0:pattern generation disable (FIFO data do not repeat dur-
ing data output)
X 1:pattern generation enable (FIFO data repeat themselves
during data output)
DO_WAIT_TRIG (R/W)
Bit # 3-0 DO_WAIT_NAE DO_MODE DO_32
Bit # 7-4 PG_STOP_TRIG PB_TERM_OFF DO_WAIT_TRG PAT_GEN
Bit # 11-8 DO_FIFO_FULL DO_UNDER DO_FIFO_CLR DO_EN
Bit # 15-12 - - BURST_HNDSH (2) DO_FIFO_EMPTY
Bit # 31-16 Don’t Care