Motorola ColdFire MCF5281 - Manual (Page 702)

Electrical Characteristics
33-18 Freescale Semiconductor
Figure 33-7 shows an SDRAM write cycle.
Figure 33-7. SDRAM Write Cycle
33.10 General Purpose I/O Timing
Table 33-17. GPIO Timing
1, 2
(V
DD
= 2.7 to 3.6 V, V
SS = 0 V, V DDH
= 5 V)
NUM Characteristic Symbol Min Max Unit
G1
G2 CLKOUT High to GPIO Output Valid t
CHPOV
— 12 ns
CLKOUT High to GPIO Output Invalid t
CHPOI
2 — ns
G3
G4 GPIO Input Valid to CLKOUT High t
PVCH
10 — ns
CLKOUT High to GPIO Input Invalid t
CHPI
2 — ns
G1a
G2a CLKOUT High to PQA/PQB Output Valid t
CHPAOV
— 12 ns
CLKOUT High to PQA/PQB Output Invalid t
CHPAOI
2 — ns
G3a
G4a PQA/PQB Input Valid to CLKOUT Low t
PAVCH
10 — ns
CLKOUT Low to PQA/PQB Input Invalid t
CHPAI
2 — ns
A[23:0]
SRAS
SCAS 1
D[31:0]
ACTV PALL NOP
SDRAM_CS[1:0]
WRITE
Row Column
CLKOUT
DRAMW
BS[3:0]
D1
D2
D4
D8
D4
0 1 2 3 4 5 6 7 8 9 10 11 12
D7
NOP
1
DACR[CASL] = 2
D4
D3
D2
D4
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3