Datasheet

Electrical Characteristics
MCF5227x ColdFire
®
Microprocessor Data Sheet, Rev. 8
Freescale Semiconductor 29
5.8 General Purpose I/O Timing
Figure 16. GPIO Timing
5.9 Reset and Configuration Override Timing
Table 17. GPIO Timing
1
1
These general purpose specifications apply to the following signals: IRQn, all UART signals, FlexCAN signals, PWM
signals, DACK
n and DREQn, and all signals configured as GPIO.
Num Characteristic Symbol Min Max Unit
G1 FB_CLK High to GPIO Output Valid t
CHPOV
—10ns
G2 FB_CLK High to GPIO Output Invalid t
CHPOI
1.5 — ns
G3 GPIO Input Valid to FB_CLK High t
PVCH
9—ns
G4 FB_CLK High to GPIO Input Invalid t
CHPI
1.5 — ns
Table 18. Reset and Configuration Override Timing
Num Characteristic Symbol Min Max Unit
R1 RESET
Input valid to FB_CLK High t
RVCH
9—ns
R2 FB_CLK High to RESET
Input invalid t
CHRI
1.5 — ns
R3 RESET
Input valid Time
1
1
During low power STOP, the synchronizers for the RESET input are bypassed and RESET is asserted asynchronously to
the system. Thus, RESET
must be held a minimum of 100 ns.
t
RIVT
5—t
CYC
R4 FB_CLK High to RSTOUT Valid t
CHROV
—10ns
R5 RSTO
UT valid to Config. Overrides valid t
ROVCV
0—ns
R6 Configuration Override Setup Time to RSTO
UT invalid t
COS
20 — t
CYC
R7 Configuration Override Hold Time after RSTOUT invalid t
COH
0—ns
R8 RSTOUT
invalid to Configuration Override High Impedance t
ROICZ
—1t
CYC
G1
FB_CLK
GPIO Outputs
G2
G3 G4
GPIO Inputs