SAB82525N-V21 Datasheet, PDF (113/126 Pages) Siemens Semiconductor Group – High-Level Serial Communication

Interface Timing
Parameter
Symbol
min.
ALE pulse width
t_AA
25
Address setup time to ALE
t_AL
10
Address hold time from ALE
t_LA
10
Address latch setup time to WR, RD
t_ALS
0
Address setup time to WR, RD
t_AS
10
Address hold time from WR, RD
t_AH
10
DMA request delay: SAB
t_DRH
SAF
RD pulse width
t_RR
70
Data output delay from RD
t_RD
Data float delay from RD
t_DF
RD control interval
t_RI
35
WR pulse width
t_WW
60
Data setup time to WR ^x CS/DS ^x CS t_DW
10
Data hold time from WR ^x CS/DS ^x CS t_WD
10
WR control interval
t_WI
60
RD delay after WR set up
t_DSD
0
Serial Interface Timing
Receive data setup
t_RDS
20
Receive data hold
t_RDH
5
Collision data setup
t_CDS
5
Collision data hold
t_CDH
30
Transmit data delay, falling clock edge t_XDD2
20
Transmit data delay, rising clock edge t_XDD1
10
Request to send delay 1
t_RTD1
10
Request to send delay 2
t_RTD2
10
Clock period
t_CP
240
Clock period LOW
t_CPL
90
Clock period HIGH
t_CPH
90
SAB 82525
SAB 82526
SAF 82525
SAF 82526
Limit Values
Unit
max.
SAB
SAF
ns
ns
ns
ns
ns
ns
80
80
ns
90
90
ns
ns
60
70
ns
25
25
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
68
75
ns
68
75
ns
120
120
ns
85
85
ns
ns
ns
ns
Semiconductor Group
113