psf21911 ETC-unknow, psf21911 Datasheet - Page 140

• Manufacturer Part Number: psf21911
• Description: Isdn Echocancellation Circuit Terminal Applications Iec-q
• Manufacturer: ETC-unknow

Semiconductor Group
5.4.2
The following 2 figures describe the read/write cycles and the corresponding address
timing for the serial microprocessor interface:
Figure 58 Serial µP Interface Mode Write
Figure 59 Serial µP Interface Mode Read
CDOUT
CDIN
CS
CCLK
CS
CCLK
CDIN
CDOUT
Serial Microprocessor Interface Timing
0 A3 A2 A1 A0 X
1 A3 A2 A1 A0 X
t
t
CSs
CSs
t
CDINs
t
CDINh
HIGH ‘Z‘
HIGH ‘Z‘
140
t
t
X X
X X
P
P
t
CDOUTd
D7
D7
D6 D5 D4 D3 D2 D1D0
D6 D5 D4 D3 D2 D1D0
Electrical Characteristics
t
CSh
t
CSh
PSB 21911
PSF 21911
11.97