mb91307r Fujitsu Microelectronics, Inc., mb91307r Datasheet - Page 29
mb91307r
Manufacturer Part Number
mb91307r
Description
32-bit Microcontroller Cmos Fr60 Mb91307 Series
Manufacturer
Fujitsu Microelectronics, Inc.
Datasheet
1.MB91307R.pdf
(96 pages)
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• RP (Return Pointer)
• SSP (System Stack Pointer)
• USP (User Stack Pointer)
• Multiply & Divide registers
The return register stores the address for return from subroutines.
During execution of a CALL instruction, the PC value is transferred to this RP register.
During execution of a RET instruction, the contents of the RP register are transferred to this PC register.
The default value at reset is undefined.
The SSP register is the system stack pointer.
When the S flag is “0,” this register functions as the R15 register.
The SSP register can also be explicitly specified.
This register is also used as a stack pointer to indicate the stack to which the PS and PC are removed when an
EIT occurs.
The default value at reset is 00000000
The USP register is the user stack pointer.
When the S flag is “1,” this register functions as the R15 register.
The USP register can also be explicitly specified.
The default value at reset is undefined.
This register cannot be used with RETI instructions.
The multiply and divide registers are each 32 bits in length.
The default value at reset is undefined.
RP
SSP
USP
MDH
MDL
31
31
31
31
Multiply & Divide Registers
SSP Register
USP Register
RP Register
H
.
0
0
0
0
[Default value]
[Default value]
[Default value]
XXXXXXXX
XXXXXXXX
00000000
MB91307 Series
H
H
H
29
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