參數(shù)資料
型號(hào)： OX16PCI952-TQFP-A
廠商： Electronic Theatre Controls, Inc.
英文描述： Integrated High Performance Dual UARTs, Parallel Port and 5.0v PCI interface
中文描述： 集成高性能的雙UART，并行端口和5.0V PCI接口
文件頁(yè)數(shù)： 56/76頁(yè)
文件大小： 1386K
代理商： OX16PCI952-TQFP-A
8.3.7
Hardware transfers data fromthis 16-bytes deep FIFO to
the peripheral when DCR(5) = ‘0’. When DCR(5) = ‘1’
hardware transfers data fromthe peripheral to this FIFO.
8.3.8
Test FIFO
Used by the software in conjunction with the full and empty
flags to determne the depth of the FIFO and interrupt
levels.
8.3.9
Configuration A register
ECR[7:5] must be set to ‘111’ to access this register.
Interrupts generated will always be level, and the ECP port
only supports an
impID
of ‘001’.
8.3.10 Configuration B register
ECR[7:5] must be set to ‘111’ to access this register. Read
only, all bits will be set to 0, except for bit[6] which will
reflect the state of the interrupt.
8.3.11 Extended control register ‘ECR’
The Extended control register is located at offset 002h in
upper block. It is used to configure the operation of the
parallel port.
ECR[4:0]: Reserved - write
These bits are reserved and must always be set to
“00001”.
ECR[0]: Empty - read
When DCR[5} = ‘0’
DataSheet Revision 1.1
Page 56
OX16PCI952
OXFORD SEMICONDUCTOR LTD.
ECP Data FIFO
logic 0
FIFO contains at least one byte
logic 1
FIFO completely empty
When DCR[5} = ‘1’
logic 0
FIFO contains at least one byte
logic 1
FIFO contains less than one byte
ECR[1]: Full - read
When DCR[5} = ‘0’
logic 0
FIFO has at least one free byte
FIFO completely full
When DCR[5} = ‘1’
logic 0
FIFO has at least one free byte
logic 1
FIFO full
ECR[2]: serviceIntr - read
When DCR[5} = ‘0’
logic 1
writeIntrThreshold (8) free bytes or more in
FIFO
When DCR[5} = ‘1’
logic 1
readIntrThreshold (8) bytes or more in FIFO
ECR[7:5]: Mode – read / write
These bits define the operatonal mode of the parallel port.
logic ‘000’
SPP
logic ‘001’
PS2
logic ‘010’
Reserved
logic ‘011’
ECR
logic ‘100’
EPP
logic ‘101’
Reserved
logic ‘110’
Test
logic ‘111’
Config
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