參數(shù)資料
型號(hào): P83CL781HDH
廠商: NXP SEMICONDUCTORS
元件分類(lèi): 微控制器/微處理器
英文描述: Low voltage 8-bit microcontrollers with UART and I2C-bus
中文描述: 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP44
封裝: 10 X 10 MM, 1.75 MM HEIGHT, PLASTIC, SOT-307-2, QFP-44
文件頁(yè)數(shù): 26/76頁(yè)
文件大?。?/td> 342K
代理商: P83CL781HDH
1997 Mar 14
26
Philips Semiconductors
Product specification
Low voltage 8-bit microcontrollers with
UART and I
2
C-bus
P83CL781; P83CL782
Table 9
Selection of the serial clock frequency SCL in a Master mode of operation
13.2
Serial Status Register (S1STA)
S1STA is a read-only register.The contents of this register may be used as a vector to a service routine. This optimizes
the response time of the software and consequently that of the I
2
C-bus. The status codes for all possible modes of the
I
2
C-bus interface are given in Tables 12 to 16.
Table 10
Serial Status Register (address D9H)
Table 11
Description of S1STA bits
Table 12
MST/TRX mode
CR2
CR1
CR0
f
osc
DIVISOR
BIT RATE (kHz) AT f
osc
3.58 MHz
6 MHz
12 MHz
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
256
224
192
160
960
120
60
14.0
16.0
18.6
22.4
3.73
29.8
59.7
23.4
26.8
31.3
37.5
6.25
50.0
100.0
46.9
53.6
62.5
75.0
12.5
100.0
not allowed
7
6
5
4
3
2
1
0
SC4
SC3
SC2
SC1
SC0
0
0
0
BIT
SYMBOL
DESCRIPTION
3 to 7
0 to 2
SC4 to SC0
5-bit status code.
These three bits are always zero.
S1STA VALUE
DESCRIPTION
08H
10H
18H
20H
28H
30H
38H
A START condition has been transmitted.
A repeated START condition has been transmitted.
SLA and W have been transmitted, ACK has been received.
SLA and W have been transmitted, ACK received.
DATA of S1DAT has been transmitted, ACK received.
DATA of S1DAT has been transmitted, ACK received.
Arbitration lost in SLA, R/W or DATA.
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