mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 611

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor, Inc.
Reserved
Reserved
31–7
Field
3–2
GS
SR
CE
ST
CI
6
5
4
1
0
This read-only bitfield is reserved and always has the value zero.
Reserved, must be cleared.
Software reset.
Performs a software reset of the RNGB. This bit is self-clearing.
0
1
Clear error.
Clears the errors in the RNG_ESR register and the RNGB interrupt.This bit is self-clearing.
0
1
Clear interrupt.
Clears the RNGB interrupt if an error is not present. This bit is self-clearing.
0
1
This read-only bitfield is reserved and always has the value zero.
Reserved, must be cleared.
Generate seed.
Initiates the seed generation process. Seed generation starts
When the seed generation process completes, this bit automatically clears and an interrupt may be
generated if all requested operations are complete.
0
1
Self test.
Initiates a self test of the RNGB's internal logic. The self-test starts
When self test completes, this bit automatically clears and an interrupt may be generated if all requested
operations are complete.
0
1
• When RNG_SR[BUSY] is cleared
• If set simultaneously with ST, after self-test
• When RNG_SR[BUSY] is cleared, or
• If set simultaneously with GS, self test takes precedence and is completed first.
Do not perform a software reset.
Software reset.
Do not clear errors and interrupt.
Clear errors and interrupt.
Do not clear interrupt.
Clear interrupt.
Not in seed generation mode.
Generate seed mode.
Not in self test mode.
Self test mode.
MCF51JF128 Reference Manual, Rev. 2, 03/2011
RNG_CMD field descriptions
Preliminary
Description
Chapter 27 Random Number Generator (RNGB)
611