ATSAM9743 Datasheet, PDF (12/21 Pages) ATMEL Corporation – Sound Synthesis Single-chip Music System

Table 9. Parameters for External 8-bit SRAM Read/Write
Symbol
Parameter
Min
t_RC
t_CSOE
t_POE
t_ACE
t_OE
t_ORB
t_ACH
t_DF
t_WC
t_CSWE
t_WP
t_DW1
t_DH1
t_AS
t_DW2
t_DH2
Word (2 x bytes) read cycle time
Chip select low. Address valid to WOE low
Output enable pulse width
Chip select. Access low byte access time.
Output enable low byte access time
Output enable low to byte select high
Byte select high byte access time
Chip select or WOE high to input data HI-Z
Write (2 x bytes) write cycle time
1st WWE low from CS or address or WOE
Write (low and high byte) pulse width
Data out low byte setup time
Data out low byte hold time
RBS high to second write pulse
Data out high byte setup time
Data out high byte hold time
5 x t_CK
2 x t_CK - 5
3 x t_CK - 5
t_CK - 5
2 x t_CK- 5
0
5 x t_CK
2 x t_CK - 10
1.5 x t_CK - 5
1.5 x t_CK - 10
0.5 x t_CK + 10
0.5 x t_CK - 5
2 x t_CK - 10
10
Typ
3 x t_CK
t_CK
Max
6 x t_CK
3 x t_CK + 5
2 x t_CK - 5
6 x t_CK
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
12 ATSAM9743
1773B–DRMSD–11/02