Freescale Semiconductor MPC5604B - Page 690

MPC5604B/C Microcontroller Reference Manual, Rev. 8
Freescale Semiconductor 679
27.5.1.18 CFlash Nonvolatile User Options register (NVUSRO)
The nonvolatile User Options Register contains configuration information for the user application.
The NVUSRO register is a 64-bit register, of which the 32 most significant bits 63:32 are ‘don’t care’ and
are used to manage ECC codes.
Offset: 0x203E18 Access: Read/write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
WATCHDOG_EN
OSCILLATOR_MARGIN
PAD3V5V
1111111111111
W
Reset
1111111111111111
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
1111111111111111
W
Reset
1111111111111111
Figure 27-22. CFlash Nonvolatile User Options register (NVUSRO)
Table 27-33. NVUSRO field descriptions
Field Description
WATCHDOG_EN WATCHDOG_EN
0: Disable after reset
1: Enable after reset
Default manufacturing value before flash memory initialization is ‘1’
OSCILLATOR_
MARGIN
OSCILLATOR_MARGIN
0: Low consumption configuration (4 MHz/8 MHz)
1: High margin configuration (4 MHz/16 MHz)
Default manufacturing value before flash memory initialization is ‘1’
PAD3V5V PA D3 V5V
0: High voltage supply is 5.0 V
1: High voltage supply is 3.3 V
Default manufacturing value before flash memory initialization is ‘1’ (3.3 V) which should
ensure correct minimum slope for boundary scan.