參數(shù)資料
型號(hào): CDP1878CE
廠商: INTERSIL CORP
元件分類: XO, clock
英文描述: CMOS Dual Counter-Timer
中文描述: 2 TIMER(S), PROGRAMMABLE TIMER, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 4/13頁
文件大小: 61K
代理商: CDP1878CE
4-94
REGISTER TRUTH TABLE
ADDRESS
ACTIVE
REGISTER COUNTER
A2
A1
A0
TPB/WR
RD
1
1
0
X
Write Counter A MSB
1
1
0
X
Read Counter A MSB
0
1
0
X
Write Counter A LSB
0
1
0
X
Read Counter A LSB
1
0
0
X
Control Register A
1
1
1
X
Write Counter B MSB
1
1
1
X
Read Counter B MSB
0
1
1
X
Write Counter B LSB
0
1
1
X
Read Counter B LSB
1
0
1
X
Control Register B
1
0
0
X
Interrupt Status Register
1
0
1
X
0
0
0
Not Used
0
0
1
Not Used
Programming Model
COUNTER A REGISTERS
COUNTER B REGISTERS
INTERRUPT STATUS REGISTER
BUS 7
WRITE ONLY
BUS 0
CONTROL REGISTER
READ ONLY
HOLDING REGISTER LSB
HOLDING REGISTER MSB
WRITE ONLY
JAM REGISTER LSB
JAM REGISTER MSB
BUS 7
WRITE ONLY
BUS 0
CONTROL REGISTER
READ ONLY
HOLDING REGISTER LSB
HOLDING REGISTER MSB
WRITE ONLY
JAM REGISTER LSB
JAM REGISTER MSB
BUS 7
READ ONLY
BUS 0
TIMER A
TIMER B
X
X
0
0
0
0
0
0
CDP1878C
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