參數(shù)資料
型號: M37281MAH-XXXSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
封裝: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-52
文件頁數(shù): 62/174頁
文件大?。?/td> 1420K
代理商: M37281MAH-XXXSP
M37281MAH–XXXSP,M37281MFH–XXXSP,M37281MKH–XXXSP, M37281EKSP
Rev.1.01
2003.07.16
page 152 of 170
Address 00FA16
b7 b6 b5 b4 b3 b2 b1 b0
I2C clock control register (S2) [Address 00FA16]
I2C Clock Control Register
0
to
4
SCL frequency control bits
(CCR0 to CCR4)
7
5
6
SCL mode
specification bit
(FAST MODE)
0: Standard clock mode
1: High-speed clock mode
0
Standard
clock mode
B
Name
Functions
After reset R W
0
ACK bit
(ACK BIT)
ACK clock bit
(ACK)
0: ACK is returned.
1: ACK is not returned.
0: No ACK clock
1: ACK clock
High speed
clock mode
Setup disabled Setup disabled
00 to 02
333
03
250
04
100
400 (See note)
05
83.3
166
06
500/CCR value
1000/CCR value
...
17.2
34.5
1D
16.6
33.3
1E
16.1
32.3
1F
Note: At 400 kHz in the high-speed clock mode, the duty is as below .
“0” period : “1” period = 3 : 2
In the other cases, the duty is as below.
“0” period : “1” period = 1 : 1
Register
value
b4 to b0
R W
(at f = 4 MHz, unit : kHz)
Setup disabled
Address 00FB16
CPU Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
B
After resetR W
0, 1
2
3, 4
0
1
Name
Functions
Processor mode bits
(CM0, CM1)
0 0: Single-chip mode
0 1:
1 0:
Not available
1 1:
Fix these bits to “1.”
1
Stack page selection
bit (CM2) (See note)
1
b1 b0
0: 0 page
1: 1 page
1
0
5
1
6
0
Main Clock (XIN–XOUT)
stop bit
(CM6)
CPU mode register (CM) [Address 00FB16]
R W
0: LOW drive
1: HIGH drive
0: Oscillating
1: Stopped
7
0
Internal system clock
selection bit
(CM7)
R W
0: XIN–XOUT selected
(high-speed mode)
1: XCIN–XCOUT selected
(low-speed mode)
Note: This bit is set to “1” after the reset release.
XCOUT drivability
selection bit (CM5)
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