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
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*
-
Stack Pointer (depends on RAM size)