參數(shù)資料
型號(hào): ST7263BK1B/XXX
廠商: STMICROELECTRONICS
元件分類(lèi): 微控制器/微處理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32
封裝: 0.400 INCH, LEAD FREE, SHRINK, PLASTIC, DIP-32
文件頁(yè)數(shù): 133/140頁(yè)
文件大小: 1423K
代理商: ST7263BK1B/XXX
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ST7263B
92/140
IC BUS INTERFACE (Cont’d)
IC CLOCK CONTROL REGISTER (CCR)
Read / Write
Reset Value: 0000 0000 (00h)
Bit 7 = FM/SM Fast/Standard IC mode.
This bit is set and cleared by software. It is not
cleared when the interface is disabled (PE=0).
0: Standard IC mode
1: Fast IC mode
Bits 6:0 = CC[6:0] 7-bit clock divider.
These bits select the speed of the bus (FSCL) de-
pending on the IC mode. They are not cleared
when the interface is disabled (PE=0).
Refer to the Electrical Characteristics section for
the table of value.
Note: The programmed FSCL assumes no load on
SCL and SDA lines.
IC DATA REGISTER (DR)
Read / Write
Reset Value: 0000 0000 (00h)
Bits 7:0 = D[7:0] 8-bit Data Register.
These bits contain the byte to be received or trans-
mitted on the bus.
– Transmitter mode: Byte transmission start auto-
matically when the software writes in the DR reg-
ister.
– Receiver mode: the first data byte is received au-
tomatically in the DR register using the least sig-
nificant bit of the address.
Then, the following data bytes are received one
by one after reading the DR register.
IC OWN ADDRESS REGISTER (OAR)
Read / Write
Reset Value: 0000 0000 (00h)
Bits 7:1 = ADD[7:1] Interface address.
These bits define the IC bus address of the inter-
face. They are not cleared when the interface is
disabled (PE=0).
Bit 0 = ADD0 Address direction bit.
This bit is don’t care, the interface acknowledges
either 0 or 1. It is not cleared when the interface is
disabled (PE=0).
Note: Address 01h is always ignored.
70
FM/SM
CC6
CC5
CC4
CC3
CC2
CC1
CC0
70
D7
D6
D5
D4
D3
D2
D1
D0
70
ADD7
ADD6
ADD5
ADD4
ADD3
ADD2
ADD1
ADD0
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