Microcontroller User's Manual

MOTOROLA Chapter 33. Electrical Characteristics 33-17
General Purpose I/O Timing
Figure 33-6 shows an SDRAM write cycle.
Figure 33-6. SDRAM Write Cycle
33.9 General Purpose I/O Timing
Table 33-13. 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
—12ns
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
A[23:0]
SRAS
SCAS
1
D[31:0]
ACTV PALLNOP
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