Z86K13 Datasheet, PDF (11/24 Pages) Zilog, Inc. – CMOS Z8 8-Bit MCU Keyboard Controllers

Zilog
Z86K13/K14/K15/K16/K17/K18
CMOS Z8® 8-Bit MCU Keyboard Controllers
Port 2 (P27-P20). Port 2 is an 8-bit CMOS compatible Port P25 have 10.4K (±35%) pull-up resistors. P26-P27 have
with 4-bit input, 4-bit programmable I/O (Figure 9). P20- 2.4K (±25%) pull-up resistors.
1
Z86KXX
4
Input
I/O
(a) Ports P20-P23
Input
OEN
Open-Drain
(b) Ports P24-P25
OUT
IN
OEN
Open-Drain
(c) Ports P26-P27
OUT
IN
Input
Input
VCC
10.4 K
Pad
VCC
10.4 kOhm
Pad
VCC
2.4K
Pad
Figure 9. Port 2 Configuration
DS97KEY0204
PRELIMINARY
11