CDP1878C View Datasheet(PDF) - Intersil
Part Name
Description
MFG CO.
'CDP1878C' PDF : 13 Pages View PDF
CDP1878C
REGISTER TRUTH TABLE
ADDRESS
A2
A1
A0
1
1
0
1
1
0
0
1
0
0
1
0
1
0
0
1
1
1
1
1
1
0
1
1
0
1
1
1
0
1
1
0
0
1
0
1
0
0
0
0
0
1
ACTIVE
TPB/WR
RD
X
X
X
X
X
X
X
X
X
X
X
X
REGISTER COUNTER
Write Counter A MSB
Read Counter A MSB
Write Counter A LSB
Read Counter A LSB
Control Register A
Write Counter B MSB
Read Counter B MSB
Write Counter B LSB
Read Counter B LSB
Control Register B
Interrupt Status Register
Not Used
Not Used
Programming Model
BUS 7
BUS 0
CONTROL REGISTER
WRITE ONLY
HOLDING REGISTER LSB
READ ONLY
HOLDING REGISTER MSB
JAM REGISTER LSB
WRITE ONLY
JAM REGISTER MSB
BUS 7
BUS 0
CONTROL REGISTER
WRITE ONLY
HOLDING REGISTER LSB
READ ONLY
HOLDING REGISTER MSB
JAM REGISTER LSB
WRITE ONLY
JAM REGISTER MSB
COUNTER A REGISTERS
COUNTER B REGISTERS
BUS 7
BUS 0
XX 0 0 0 0 0 0
READ ONLY
TIMER A
TIMER B
INTERRUPT STATUS REGISTER
4-94
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