RS8953 Conexant Systems, Inc., RS8953 Datasheet - Page 161

• Manufacturer Part Number: RS8953
• Description: High-bit-rate Digital Subscriber Line (hdsl) Channel unit
• Manufacturer: Conexant Systems, Inc.

RS8953B/8953SPB
HDSL Channel Unit
6.1.5 MPU Interface Timing
Table 6-9. MPU Interface Timing Requirements
Table 6-10. MPU Interface Switching Characteristics
N8953BDSB
Symbol
Symbol
10
11
12
13
14
15
16
17
1
2
3
5
6
7
8
9
ALE Pulse-Width High
Address Input Setup to ALE Falling
Address Input Hold after ALE Low
Data Input Setup to End of Write Pulse
Data Input Hold After Write Pulse
WR* Setup to Start of Read or Write Pulse
WR* Hold after Read or Write Pulse
ALE Hold after Read or Write Pulse
Write Pulse-Width:
Read Pulse Width (WR* = 1, RD* and CS* Low)
Read Pulse Width (WR* = 1, RD* and CS* Low)
Address = 0x3C only.
Data Out Enable (Low Z) after Start of Read Pulse
Data Out Valid After Start of Read Pulse (Access Time)
Data Out Hold After End of Read Pulse
Data Out Disable (High Z) after End of Read Pulse
INTR* Hold After End of Write Pulse
INTR* Delay from End of Write Pulse
WR*, RD*, and CS* Low (MPUSEL = 1)
RD* = 1, WR*, and CS* Low (MPUSEL = 0)
(when writing interrupt mask or clear registers)
(when writing interrupt mask or enable registers)
Motorola- (MPUSEL = 1) and Intel- (MPUSEL = 0) style microprocessor bus
timing, as follows:
Parameter
Parameter
Conexant
Minimum
2
2
Minimum
6.0 Electrical and Timing Specifications
26
20
10
10
10
10
------------- -
f
------------- -
f
8
8
2
1
5
7
GCLK
GCLK
1
1
6.1 Absolute Maximum Ratings
Maximum
Maximum
26
25
20
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
6-7