Zenith Z-100 PC series Service Manual page 107

Page
4-21
Detailed Circuit Description
Keyboard Communication
The keyboard sends data in serial format to the gate array (KBDAT)
along with a clock (KYBCLK). Table 4-8 identifies the keyboard signals.
Refer to Figure 4-10 for the connector pinouts.
Figure 4-10: Keyboard Connector Pinouts
Table 4-8: Keyboard Signals
CONNECTOR
PIN NUMBER SIGNAL NAME DESCRIPTION
1 KYBCLK
Timing signal to gate array.
2 KYBDATA Serial data to gate array.
3 KYBRST* Reset signal from gate array.
4
KYBGND
Ground.
5 KYBPWR +5 VDC power supply.