Motorola ColdFire MCF5281 - Manual (Page 703)

Electrical Characteristics
Freescale Semiconductor 33-19
Figure 33-8. GPIO Timing
33.11 Reset and Configuration Override Timing
1
GPIO pins include: Ports A-I, INT, SPI, SCI1/2 (including SCI functions), FlexCAN and Timer.
2
Because of long delays associated with the PQA/PQB pads, signals on the PQA/PQB pins will be updated on the
following edge of the clock.
Table 33-18. Reset and Configuration Override Timing
(V
DD
= 2.7 to 3.6 V, V
SS = 0 V)
1
1
All AC timing is shown with respect to 50% V
DD
levels unless otherwise noted.
NUM Characteristic Symbol Min Max Unit
R1 RSTI Input valid to CLKOUT High t
RVCH
10 — ns
R2 CLKOUT High to RSTI Input invalid t
CHRI
2 — ns
R3 RSTI Input valid Time
2
2
During low-power STOP, the synchronizers for the RSTI input are bypassed and RSTI is asserted asynchronously to
the system. Thus, RSTI must be held a minimum of 100 ns.
t
RIVT
5 — t
CYC
R4 CLKOUT High to RSTO Valid t
CHROV
— 12 ns
R5 RSTO valid to Config. Overrides valid t
ROVCV
0 — ns
R6 Configuration Override Setup Time to RSTO invalid t
COS
20 — t
CYC
R7 Configuration Override Hold Time after RSTO invalid t
COH
0 — ns
R8 RSTO invalid to Configuration Override High Impedance t
ROICZ
— 1 t
CYC
G1
CLKOUT
GPIO Outputs
G2
PQA/PQB Outputs
G2a
G3a G4a
PQA/PQB Inputs
G3 G4
GPIO Inputs
G1a
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3