參數(shù)資料
型號: Z86C45
廠商: ZiLOG, Inc.
英文描述: CMOS Z8 MCU(CMOS Z8系列微控制器)
中文描述: 單片機的CMOS Z8的CMOS(Z8系列微控制器)
文件頁數(shù): 25/70頁
文件大?。?/td> 1192K
代理商: Z86C45
Z86C34/C35/C36/C44/C45/C46
CMOS Z8 MCUs with ASCI UART
ZiLOG
DS007601-Z8X0499
P R E L I M I N A R Y
25
Port 2 (P27–P20).
Port 2 is an 8-bit, bidirectional, CMOS-
compatible I/O port. These eight I/O lines are configured
under software control as an input or output, independently.
Port 2 is always available for I/O operation. The input buff-
ers are Schmitt-triggered. Bits programmed as outputs may
be globally programmed as either push-pull or open-drain.
Low-EMI output buffers can be globally programmed by
the software.
Port 2 may be placed under handshake control. In this Hand-
shake Mode, Port 3 lines
P31
and
P36
are used as the hand-
shake controls lines
DAV2
and
RDY2
. The handshake signal
assignment for Port 3 lines
P31
and
P36
is dictated by the di-
rection (input or output) assigned to Bit 7, Port 2 (Figure 14).
Figure 14. Port 2 Configuration
Open Drain
OE
Out
In
1.5 2.3 Hysteresis @ V
CC
= 5.0V.
PAD
Auto Latch
(mask option)
Port 2 (I/O)
Handshake Controls
DAV2 and RDY2
(P31 and P36)
Z8
R
500 K
Pull-Up
Transistor Enable
(Mask Option)
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