MPC5121E datasheet(72/86 Pages) FREESCALE

72 / 86 page

MPC5121E/MPC5123 Data Sheet, Rev. 4

Electrical and Thermal Characteristics

Freescale Semiconductor

Figure 52. 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 49 gives the Fusebox specification.

Table 48. GPIO/Timers Input AC Timing Specifications

Symbol

Description

Min

Unit

SpecID

tIOWID

GPIO/Timers inputs—minimum pulse witdh

2T1

1 T is the IP bus clock cycle. T= 12 ns is the minimum value (for the maximum IP bus freqency of 83 MHz).

A21.1

Table 49. Fusebox Characteristics

Sym

Description

Min

Max

Units

SpecID

tFUSEWR 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

—

A22.1

IFUSEWR Program current to program one fuse bit

—

A22.2

SCK

(CLKPOL=0)

SCK

(CLKPOL=1)

MOSI

Input

MISO

Output

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