Section 2 Programming Model
Rev. 1.00 Oct. 01, 2007 Page 38 of 1956
REJ09B0256-0100
2.2 Register
Descriptions
2.2.1
Privileged Mode and Banks
(1) Processing
Modes
This LSI has two processing modes, user mode and privileged mode. This LSI normally operates
in user mode, and switches to privileged mode when an exception occurs or an interrupt is
accepted. There are four kinds of registers—general registers, system registers, control registers,
and floating-point registers—and the registers that can be accessed differ in the two processing
modes.
(2) General
Registers
There are 16 general registers, designated R0 to R15. General registers R0 to R7 are banked
registers which are switched by a processing mode change.
•
Privileged mode
In privileged mode, the register bank bit (RB) in the status register (SR) defines which banked
register set is accessed as general registers, and which set is accessed only through the load
control register (LDC) and store control register (STC) instructions.
When the RB bit is 1 (that is, when bank 1 is selected), the 16 registers comprising bank 1
general registers R0_BANK1 to R7_BANK1 and non-banked general registers R8 to R15 can
be accessed as general registers R0 to R15. In this case, the eight registers comprising bank 0
general registers R0_BANK0 to R7_BANK0 are accessed by the LDC/STC instructions.
When the RB bit is 0 (that is, when bank 0 is selected), the 16 registers comprising bank 0
general registers R0_BANK0 to R7_BANK0 and non-banked general registers R8 to R15 can
be accessed as general registers R0 to R15. In this case, the eight registers comprising bank 1
general registers R0_BANK1 to R7_BANK1 are accessed by the LDC/STC instructions.
•
User mode
In user mode, the 16 registers comprising bank 0 general registers R0_BANK0 to R7_BANK0
and non-banked general registers R8 to R15 can be accessed as general registers R0 to R15.
The eight registers comprising bank 1 general registers R0_BANK1 to R7_BANK1 cannot be
accessed.
Содержание SH7763
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Страница 122: ...Section 2 Programming Model Rev 1 00 Oct 01 2007 Page 56 of 1956 REJ09B0256 0100 ...
Страница 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
Страница 170: ...Section 4 Pipelining Rev 1 00 Oct 01 2007 Page 104 of 1956 REJ09B0256 0100 ...
Страница 282: ...Section 7 Caches Rev 1 00 Oct 01 2007 Page 216 of 1956 REJ09B0256 0100 ...
Страница 378: ...Section 9 Interrupt Controller INTC Rev 1 00 Oct 01 2007 Page 312 of 1956 REJ09B0256 0100 ...
Страница 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Страница 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Страница 686: ...Section 14 Direct Memory Access Controller DMAC Rev 1 00 Oct 01 2007 Page 620 of 1956 REJ09B0256 0100 ...
Страница 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Страница 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
Страница 752: ...Section 18 Power Down Mode Rev 1 00 Oct 01 2007 Page 686 of 1956 REJ09B0256 0100 ...
Страница 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Страница 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Страница 1060: ...Section 23 Gigabit Ethernet Controller GETHER Rev 1 00 Oct 01 2007 Page 994 of 1956 REJ09B0256 0100 ...
Страница 1062: ...Section 24 IP Security Accelerator SECURITY Rev 1 00 Oct 01 2007 Page 996 of 1956 REJ09B0256 0100 ...
Страница 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Страница 1184: ...Section 27 Serial Communication Interface with FIFO SCIF Rev 1 00 Oct 01 2007 Page 1118 of 1956 REJ09B0256 0100 ...
Страница 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Страница 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Страница 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Страница 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
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Страница 2026: ...SH7763 Hardware Manual ...