Z86L7808PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z86L7808PSC' PDF : 59 Pages View PDF
Zilog
Z86L78
IR/Low-Voltage Microcontroller
Port 2 (P27-P20). Port 2 is an 8-bit, bidirectional, CMOS- The Z86L78 wakes up with the eight bits of Port 2 config-
compatible I/O port. These eight I/O lines can be indepen- ured as inputs with open-drain outputs.
dently configured under software control as inputs or out-
puts. Port 2 is always available for I/O operation. A mask
Port 2 also has an 8-bit input OR and an AND gate which
1
option is available to connect eight 200 KOhm (±50%) pull- can be used to wake up the part (Figure 33). P20 can be
up resistors on this port. Bits programmed as outputs are programmed to access the edge selection circuitry (Figure
globally programmed as either push-pull or open-drain. 10).
Z86L78
MCU
Port 2 (I/O)
Open-Drain
OEN
Out
In
VCC
200 kΩ
Mask
Option
Pad
Figure 10. Port 2 Configuration
DS97LVO0701
2-15
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