參數(shù)資料
型號： PCF8574TD
英文描述： I/O Port
中文描述： I / O端口
文件頁數(shù)： 15/24頁
文件大小： 179K
代理商： PCF8574TD
1997 Feb 13
15
Philips Semiconductors
Product specification
256 to 1024
×
8-bit CMOS EEPROMs with
I
2
C-bus interface
PCF85xxC-2 family
Fig.13 Page mode.
handbook, full pagewidth
td
tHIGH
f
r
LOW
t
STOP
1
2
PTC
SDA
SCL
MBA699
1153
Fig.14 External clock.
(1) If an external clock is chosen, this information is latched internally by setting pin 7 (PTC) LOW after transmission of the eighth bits of the word
address (negative edge of SCL). Thus the state of pin 7 may be previously undefined. Leaving pin 7 LOW causes a higher standby current.
(2) 1-byte programming.
(3) 2-byte programming.
(4) One page (8 bytes) programming.
handbook, full pagewidth
S
0 A
A
DATA
A
DATA
A
P
SLAVE ADDRESS
WORD ADDRESS
(1)
undefined
1
1
1
2
2
2
257
513
1153
clock (2)
clock (3)
clock (4)
td
negative edge
SCL 8-bit
undefined
LOW
HIGH
PTC
I C-bus
MBA700
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