STR91XFA STMICROELECTRONICS [STMicroelectronics], STR91XFA Datasheet - Page 61

• Manufacturer Part Number: STR91XFA
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STR91xFA
Table 26.
Notes: 1 ALE_LENGTH = 1 by default (can be programmed to be 2 by setting the bits In the SCU_SCR0
Symbol
t
t
t
t
t
t
t
t
t
WCR
WP
WDS
WDH
WAS
WAH
AW
AAH
AAS
2 WSTWR =1Fh by default (WR wait state time = WSTWR x t
3 WSTWEN= 0 by default (WR assertion delay from chip select. WSTWEN can be programmed
4 When the CPU executes a 16-bit write to a x8 EMI bus, the second write cycle's address setup
WRn to CSn inactive
Write Pulse Width
Write Data Setup
Time
(non-mux mode)
Write Data Setup
Time
(mux mode )
Write Data Hold
Time
Write Address Setup
Time
Write Address Hold
Time
ALE pulse width
Address to ALE hold
time
Address to ALE
setup time
register)
in the EMI_WCRx Register)
in the EMI_WECRx Register)
time is defined as t
EMI write operation
Parameter
WAS
ALE
length=1
WSTWEN>2
ALE
length=2
WSTWEN>3
Conditions
=(WSTWEN - ½) x t
Test
(WSTWR-WSTWEN + 1) x
(ALE_LENGTH x t
(ALE_LENGTH x t
(WSTWEN + 1/2) x t
(WSTWEN - 1.5) x t
(WSTWEN - 2.5) x t
(WSTWEN + 1/2) x
(t
(t
(t
t
BCLK
BCLK
BCLK
t
BCLK
BCLK
t
BCLK
BCLK
Min
/2) - 1
/2) - 1
/2) -1
-1
- 1
/2
4)
BCLK
BCLK
BCLK
BCLK
BCLK
)- 1
)-1
Value
BCLK
(WSTWR-WSTWEN + 1) x
(ALE_LENGTH x t
, WSTWR can be programmed
(WSTWEN + 1/2) x
(t
(t
(t
t
BCLK
BCLK
BCLK
BCLK
t
BCLK
Max
Electrical characteristics
+1
/2) + 1
/2) + 1
/2) +1
+1
+ 1
4)
BCLK
)
61/78
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns