NEC PC-8201 - Page 17

3.1.6 Calendar Clock Interface
Calendar clock interface is equipped with
an LSI for watch (pPD 1990AC).
The following
-
shows the 110 port.
* Command data output port
OUT 09
C2. C1. CO
Conlnland output port
COO
CCK SHIFT CLOCK
0 Clock Off
1 Clock On
CDO Data output port
CCK
The first value is 05H
*
Command Strobe to the Clock
C2
OUT 90
TSTB
C1
TSTB COMMAND STROBE TO CLOCK
0 Strobe Off
1 Strobe On
CO
* Data from Clock
CDI
CLOCK DATA INPUT PORT
3 -8