U4091B TEMIC Semiconductors, U4091B Datasheet - Page 9

• Manufacturer Part Number: U4091B
• Description: Programmable Telephone Audio Processor
• Manufacturer: TEMIC Semiconductors

Rev. A1: 12.07.1995
Serial Bus
The circuit is remoted by an external microcontroller
through the serial bus:
The data is an 8-bit word:
B7 – B6 – B5: address of the destination register (0 to 7)
B4 – B0: contents of register
TELEFUNKEN Semiconductors
937614
CO
94 7896 e
m
P
Preliminary Information
CLOCK
DATA
The data line must be stable when the clock is high and
data must be serially shifted.
After 8 clock periods, the transfer to the destination regis-
ter is (internally) generated by a low to high transition of
the data line when the clock is high.
CLOCK OUTPUT <CO>
D
C
U4091B
937613
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