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| 型號： | R5F36S1ENFB |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 32.72 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 14 MM, 0.50 MM PITCH, PLASTIC, HTQFP-100 |
| 文件頁數(shù)： | 6/55頁 |
| 文件大?。?/td> | 748K |
| 代理商： | R5F36S1ENFB |
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M16C/6S1 Group
2. Central Processing Unit (CPU)
Under development Preliminary document
Specifications in this document are tentative and subject to change.
R01DS0054EJ0050 Rev.0.50
Page 14 of 52
Jun 14, 2011
2.2
Address Registers (A0 and A1)
A0 and A1 are 16-bit registers used for indirect addressing, relative addressing, transfer, arithmetic, and
logic operations. A0 can be combined with A1 and used as a 32-bit address register (A1A0).
2.3
Frame Base Register (FB)
FB is a 16-bit register that is used for FB relative addressing.
2.4
Interrupt Table Register (INTB)
INTB is a 20-bit register that indicates the start address of a relocatable interrupt vector table.
2.5
Program Counter (PC)
The PC is 20 bits wide and indicates the address of the next instruction to be executed.
2.6
User Stack Pointer (USP) and Interrupt Stack Pointer (ISP)
The USP and ISP stack pointers (SP) are each comprised of 16 bits. The U flag is used to switch between
USP and ISP.
2.7
Static Base Register (SB)
SB is a 16-bit register used for SB relative addressing.
2.8
Flag Register (FLG)
FLG is an 11-bit register that indicates the CPU state.
2.8.1
Carry Flag (C Flag)
The C flag retains a carry, borrow, or shift-out bit generated by the arithmetic/logic unit.
2.8.2
Debug Flag (D Flag)
The D flag is for debugging only. Set it to 0.
2.8.3
Zero Flag (Z Flag)
The Z flag becomes 1 when an arithmetic operation results in 0. Otherwise, it becomes 0.
2.8.4
Sign Flag (S Flag)
The S flag becomes 1 when an arithmetic operation results in a negative value. Otherwise, it becomes
0.
2.8.5
Register Bank Select Flag (B Flag)
Register bank 0 is selected when the B flag is 0. Register bank 1 is selected when this flag is 1.
2.8.6
Overflow Flag (O Flag)
The O flag becomes 1 when an arithmetic operation results in an overflow. Otherwise, it becomes 0.
2.8.7
Interrupt Enable Flag (I Flag)
The I flag enables maskable interrupts.
Maskable interrupts are disabled when the I flag is 0, and enabled when it is 1. The I flag becomes 0
when an interrupt request is accepted.
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