U4091B Datasheet, PDF (9/11 Pages) TEMIC Semiconductors – Programmable Telephone Audio Processor

TELEFUNKEN Semiconductors
CO
94 7896 e
U4091B
CLOCK OUTPUT <CO>
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
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.
DATA
D
mP
C
CLOCK
937613
937614
Rev. A1: 12.07.1995
Preliminary Information
9 (11)