參數(shù)資料
型號(hào): ZR38650
廠商: Electronic Theatre Controls, Inc.
英文描述: PROGRAMMABLE DIGITAL AUDIO PROCESSOR
中文描述: 可編程數(shù)字音頻處理器
文件頁(yè)數(shù): 46/66頁(yè)
文件大小: 441K
代理商: ZR38650
46
ZR38650
Parallel Host And Parallel Data
Figure 20 shown the connections for using the parallel port as
the interface to a host controller for both control with commands
and for the parallel data stream input.
The ZR38650 appears in the controller’s address space as three
registers: an 8-bit read/write command/response register, a 9-bit
data input write-only register and as a 3-bit read-only flag regis-
ter. The flag register permits getting error messages from the
ZR38650 (ERROR) and the DREQ and RDY bits are for pro-
grammed transfers when the ZR38650 is respectively a master
or slave on the input data stream. Or the RDY signal may be
used directly for a hardware I/O transfer as shown when the
ZR38650 is a slave.
Figure 20. ZR38650 Connections With Parallel Port Interface To Host For Commands And Data Input
D14/RDY
D12/ERR
P/M
VDD
RD
WR
CS
D13/ C/D
D[11:4]/PP[7:0]
ERROR/GPIO1
DREQ/GPIO0
WR
RD
Host Bus
Address
Address
Decode
Data
RDY
Tri-State
Buffer
Host Processor
A
D
C
CS
Command/Data
Register
ERROR
DREQ
3
RDY
Flag Register
Data
Data
8
ZR38650
CS OE
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