Registers modified by boot rom, 1 evaluation chip mb91v460, 2 flash devices of mb91460 series – FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 53 Fixed Mode-Reset Vector / BOOT-ROM

3.Registers modified by Boot ROM

3. Registers modified by Boot ROM

The Boot ROM initializes the chip and changes the settings of some registers (see table below).

(Note) The RSRR register can only be read once. After reading the RSRR-register, the contents will be present in
R4 (C-Compiler convention for parameters) after a branch to application start or the address specified by the Boot-
Security-Vector.

3.1 Evaluation Chip MB91V460

(Note) * these registers will only be modified if a check for valid boot condition is performed

3.2 Flash devices of MB91460 series

(Note) * these registers will only be modified if a check for valid boot condition is performed

Register

Value

Address

Description

TBCR

0x03

0x482

Time-Base Counter/Sync-RST Register

RSRR

0 (see note)

0x480

Reset Source Register (visible in R4)

TBR

0x0FFC00

Table Base Register

SP*

0x0203F8

Stack Pointer

PFR21*

0x07

0xD95

Port Function Register Port 21 (UART0)

SMR00*

0x05

0x041

UART0 Mode Register

SCR00*

0x17

0x040

UART0 Control Register

SSR00*

0x042

UART0 Serial Status Register

RDR00*

0x043

UART0 Reception Data Register

TRD00*

0x043

UART0 Transmission Data Register

BGR00*

0x0CF

0x080

UART0 Baud Rate/Reload Counter Register

TMCSR0*

0x0003

0x1B6

Reload Timer 0 Control Status Register

TMRLR0*

0x03E8

0x1B0

Reload Timer 0 Reload Register

TMR0*

0x1B2

Reload Timer 0 Timer Register