cn8237 Mindspeed Technologies, cn8237 Datasheet - Page 363

• Manufacturer Part Number: cn8237
• Description: Atm Oc-12 Servicesar Plus With Xbr Traffic Management
• Manufacturer: Mindspeed Technologies

CN8237
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
16.1.4 PHY Interface Timing
Figure 16-14. CN8237/PHY Functional Timing with Inserted Wait States (Normal Mode)
28237-DSH-001-C
PDATA[7:0] (write)
PDATA[7:0] (read)
PADDR[12:0]
PWAIT*
PWNR
PCLK
PCS*
PDS*
PAS*
Tcs
Tas
Twr
Tad
Tda
CN8237 PHY interface timing for the normal mode is provided in
Table 16-7. Interface Timing
Tclk
Tclkds
Tcs
Tas
Twr
Tds
Tad
Tda
Twsu
Twhd
Tdasu
Tdahd
NOTE(S):
(1)
Write Address
Write Data
Symbol
PCLK frequency is a function of the PCI CLK (HCLK) and the PLL divider that generates
the internal SYSCLK.
address
Tclk
Mindspeed Technologies
All outputs are measured driving a 50 pF load.
PCLK period
PCLK duty cycle
PCLK fall to PCS*
PCLK fall to PAS*
PCLK fall to PWNR*
PCLK fall to PDS*
PCLK fall to PADDR
PCLK fall to PDATA (Write)
PWAIT* setup to PCLK rise or fall
PWAIT* hold after PCLK rise or fall
PDATA hold after PCLK rise (Read)
PDATA setup before PCLK rise (Read)
Tas
Tds
Twsu
(1)
Parameter
—
wait
Normal Mode
Twhd
16.0 Electrical and Mechanical Specifications
™
Twsu
Tdsu
data
Tdhd
30.2
Min
45
–4
–4
–4
–4
–4
–4
3
1
8
1
Tcs
Tds
Max
—
55
—
—
—
—
4
4
4
4
4
4
Table
Twr
Tad
Tda
16.1 Timing
16-7.
Units
ns
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
100944_001
16-15