參數(shù)資料
型號: PCL6045B
廠商: Electronic Theatre Controls, Inc.
英文描述: User Manual For PCL6045B Pulse Control LSI
中文描述: 用戶手冊PCL6045B脈沖控制大規(guī)模集成電路
文件頁數(shù): 34/176頁
文件大?。?/td> 7952K
代理商: PCL6045B
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7-5. General-purpose output port control command
By writing an output control command to the output port (OTPB: Address 2 when using a Z80 interface),
the PCL will control the output of the P0 to P7 terminals.
When the I/O setting for P0 to P7 is set to output, the PCL will output signals from terminals P0 to P7 to
issue the command.
When writing words to the port, the upper 8 bits are discarded. However, they should be set to zero to
maintain future compatibility.
The output status of terminals P0 to P7 are latched, even after the I/O setting is changed to input.
The output status for each terminal can be set individually using the bit control command.
7-5-1. Command writing procedures
Write control data to output port (OTPB: Address 2h when a Z80 I/F is used).
To continue with the next command, the LSI must wait for four reference clock cycles (approx. 0.2 μsec
when CLK = 19.6608 MHz). The
terminal outputs a wait request signal.
7-5-2. Command bit allocation
Output P0
Output P1
Output P2
Output P3
Output P4
Output P5
Output P6
Output P7
0: Low level 1: High level
7 6 5 4 3 2 1 0
OTP7 OTP6 OTP5 OTP4 OTP3 OTP2 OTP1 OTP0
A0
to
A2
D0
to
D7
2h
Command
Next
command
address
Command
4
cycle
of
reference
clock
CS
WR
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