參數(shù)資料
型號(hào): Z80181
廠商: ZiLOG, Inc.
英文描述: SMART ACCESS CONTROLLER (SAC⑩)
中文描述: 智能門禁控制器(國資委⑩)
文件頁數(shù): 9/74頁
文件大?。?/td> 540K
代理商: Z80181
2-9
Zilog
DS971800500
Z80181
S
MART
A
CCESS
C
ONTROLLER
SAC
PIA/CTC SIGNALS
Pin Name
Pin Number
Input/Output, Tri-State
Function
PIA17-PIA14 35-38
I/O
Port 1 Data 7-Port 1 Data 4 or CTC ZC/TO3 - ZC/TO0.
These lines can be configured as inputs or outputs on a bit
-by-bit basis. Also, under program control, these bits
become Z80 CTC’s ZC/TO3 - ZC/TO0, and in either timer
or counter mode, pulses are output when the down counter
has reached zero. On reset, these signals function as
PIA17-14 and are inputs.
PIA13-PIA10 31-34
I/O
Port 1 Data 3-Port 1 Data 0 or CTC CLK/TRG3-0.
These
lines can be configured as inputs or outputs on a bit by bit
basis. Also, under program control, these bits become Z80
CTC’s CLK/TRG3-CLK/TRG0, and correspond to four
Counter/Timer Channels. In the counter mode, each active
edge causes the downcounter to decrement by one. In
timer mode, an active edge starts the timer. It is program
selectable whether the active edge is rising or falling. On
reset, these signals are set to PIA13-10 as inputs.
PIA27-20
41-48
I/O
Port 2 Data.
These lines are configured as inputs or
outputs on a bit-by-bit basis. On reset, they are inputs.
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