參數(shù)資料
型號(hào): CDP1854AD
廠商: HARRIS SEMICONDUCTOR
元件分類: 微控制器/微處理器
英文描述: Programmable Universal Asynchronous Receiver/Transmitter (UART)
中文描述: 1 CHANNEL(S), 400K bps, SERIAL COMM CONTROLLER, CDIP40
文件頁(yè)數(shù): 14/21頁(yè)
文件大?。?/td> 95K
代理商: CDP1854AD
5-55
Mode Input Low (Mode = 0)
NOTE:
1. Read is the overlap of CS1, CS3, RD/WR = 1 and CS2 = 0.
FIGURE 6. MODE 1 CPU INTERFACE (READ) TIMING DIAGRAM
t
RST
t
TRS
t
TT
t
RSDV
TPB
R BUS 0-
R BUS 7
CS2
RD/WR, CS1, CS3
(NOTE 1)
RSEL
t
RDV
t
RDDA
t
RDH
FIGURE 7. MODE 0 BLOCK DIAGRAM (INDUSTRY STANDARD COMPATIBLE)
CONTROL
REGISTER
26
T
TRANSMITTER
HOLDING REGISTER
TRANSMITTER BUS
TRANSMITTER
SHIFT
REGISTER
PARITY
GEN
RECEIVER BUS
TRANSMITTER
TIMING AND
CONTROL
40
T CLOCK
TRANSMITTER SECTION
RECEIVER
TIMING AND
CONTROL
17
RECEIVER SECTION
RECEIVER
HOLDING
REGISTER
20
SDI
25
SDO
27
T
28
T
29
T
30
T
31
T
32
T
33
T
35
P
36
S
39
E
38
W
37
W
23
THRL
CRL
SFD
STATUS
REGISTER
22
T
24
T
13
P
14
F
15
O
DAR
R CLOCK
RECEIVER
SHIFT
REGISTER
19
D
5
R
THREE-STATE
DRIVERS
6
R
7
R
8
R
9
R
10
R
11
R
12
R
RRD
4
18
16
34
1 = V
DD
2, 3 = V
SS
21 = MR
CDP1854A, CDP1854AC
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