Datasheet

Electrical and Thermal Characteristics
MPC5121E/MPC5123 Data Sheet, Rev. 5
Freescale Semiconductor 75
Figure 53. Timing Diagram – SPI Slave Mode, Format 1 (CPHA = 1)
3.3.21 GPIOs and Timers
The MPC5121e/MPC5123 contains several sets of I/Os that do not require special setup, hold, or valid requirements. The
external events (GPIO or timer inputs) are asynchronous to the system clock. The inputs must be valid for at least tIOWID to
ensure proper capture by the internal IP clock.
3.3.22 Fusebox
Table 50 gives the Fusebox specification.
Table 49. GPIO/Timers Input AC Timing Specifications
Symbol Description Min Unit SpecID
t
IOWID
GPIO/Timers inputs—minimum pulse width 2T
1
1
T is the IP bus clock cycle. T= 12 ns is the minimum value (for the maximum IP bus frequency of 83 MHz).
ns A21.1
Table 50. Fusebox Characteristics
Symbol Description Min Max Units SpecID
t
FUSEWR
Program time
1
for Fuse
1
The program length is defined by the value defined in the EPM_PGM_LENGTH bits of the IIM module.
125 — us A22.1
I
FUSEWR
Program current to program one fuse bit — 10 mA A22.2
SCK
(CLKPOL=0)
SCK
(CLKPOL=1)
MOSI
Input
Input
Input
SS
Input
MISO
Output
1
2
2
7
8
3
4
6
5