參數(shù)資料
型號: Z86E72
廠商: ZiLOG, Inc.
英文描述: OTP IR Microcontroller(一次可編程紅外線微控制器)
中文描述: 檢察官辦公室紅外微控制器(一次可編程紅外線微控制器)
文件頁數(shù): 22/75頁
文件大?。?/td> 394K
代理商: Z86E72
Z86E72/73
OTP IR Microcontroller
Zilog
22
P R E L I M I N A R Y
DS97LVO1100
PIN FUNCTIONS
(Continued)
Port 2
(P27-P20). Port 2 is an 8-bit, bidirectional, CMOS-
compatible I/O port. These eight I/O lines can be indepen-
dently configured under software control as inputs or out-
puts. Port 2 is always available for I/O operation. A soft-
ware option is available to connect eight 200 kOhms
(±50%) pull-up resistors on this port. Bits programmed as
outputs are globally programmed as either push-pull or
open-drain. Port 2 may be placed under handshake con-
trol. In this configuration, Port 3 lines, P31 and P36 are
used as the handshake controls lines /DAV2 and RDY2.
The handshake signal assignment for Port 3, lines P31
and P36 is dictated by the direction (input or output) as-
signed to Bit 7, Port 2 (Figure 10).
The CCP wakes up with the eight bits of Port 2 configured
as inputs with open-drain outputs.
Port 2 also has an 8-bit input OR and an AND gate which
can be used to wake up the part. P20 can be programmed
to access the edge selection circuitry (Figure 21).
Figure 16. Port 2 Configuration
Open-Drain
OEN
Out
In
PAD
Port 2 (I/O)
Optional
Handshake Controls
/DAV2 and RDY2
(P31 and P36)
(L72/E72 Only)
Z86LXX
MCU
VCC
200 k
Mask
Option
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