Z86L70 Datasheet, PDF (15/61 Pages) Zilog, Inc. – IR/Low-Voltage Microcontroller

Zilog
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Port 2 (P27-P20). Port 2 is an 8-bit, bidirectional, CMOS- drain. The Z8 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 KOhms (±50%) ^{can be used to wake up the part from STOP Mode (Figure}
pull-up resistors on this port. Bits programmed as outputs ^{33). P20 can be programmed to access the edge selection}
are globally programmed as either push-pull or open- ^{circuitry (Figure 9).}
Z86LXX
MCU
Port 2 (I/O)
Open-Drain
OEN
Out
In
VCC
200 KΩ
Mask
Option
PAD
Figure 9. Port 2 Configuration
DS97LVO0500
PRELIMINARY
1-15