参数资料
型号: P87C766CBA
厂商: NXP SEMICONDUCTORS
元件分类: 微控制器/微处理器
英文描述: Microcontrollers for PAL/SECAM TV with OSD and VST
中文描述: 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, MO-047AC, SOT-188-2, LCC-68
文件页数: 19/92页
文件大小: 382K
代理商: P87C766CBA
1999 Mar 10
19
Philips Semiconductors
Product specification
Microcontrollers for PAL/SECAM TV
with OSD and VST
P8xCx66 family
Table 8
Selection of SCL frequency in Master mode
10.4
Status Register (S1STA)
S1STA is an 8-bit read-only Special Function Register. The contents of S1STA may be used as a vector to a service
routine. This optimizes 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 Table 12. The abbreviations used in Table 12 are defined in
Table 11.
Table 9
Status Register (SFR address D9H)
Table 10
Description of S1STA bits
Table 11
Abbreviations used in Table 12
CR2
CR1
CR0
f
osc
DIVISOR
60
1600
40
30
240
3200
160
120
BIT RATE (kHz) at f
osc
= 12 MHz
200
7.5
300
400
50
3.75
75
100
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
7
6
5
4
3
2
1
0
SC4
SC3
SC2
SC1
SC0
0
0
0
BIT
SYMBOL
DESCRIPTION
7 to 3
2 to 0
SC4 to SC0
5-bit status code; see Table 12.
These 3 bits are held LOW.
SYMBOL
DESCRIPTION
SLA
R
W
ACK
ACK
DATA
MST
SLV
TRX
REC
7-bit slave address
read bit
write bit
acknowledgment (Acknowledge bit = 0)
not acknowledge (Acknowledge bit = 1)
8-bit byte to or from the I
2
C-bus
master
slave
transmitter
receiver
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