R5F21132FP Renesas Electronics America, R5F21132FP Datasheet - Page 10

• Manufacturer Part Number: R5F21132FP
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/13r

Specifications of R5F21132FP

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• For Use With: R0E521134CPE00 - EMULATOR COMPACT R8C/13
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

R8C/13 Group
Rev.1.20
REJ03B0069-0120
2.2 Address Registers (A0 and A1)
2.3 Frame Base Register (FB)
2.4 Interrupt Table Register (INTB)
2.5 Program Counter (PC)
2.6 User Stack Pointer (USP) and Interrupt Stack Pointer (ISP)
2.7 Static Base Register (SB)
2.8 Flag Register (FLG)
A0 is a 16-bit register for address register indirect addressing and address register relative addressing.
They also are used for transfer, arithmetic and logic operations. The same applies to A1 as A0. A0 can be
combined with A0 to be used as a 32-bit address register (A1A0).
FB is a 16-bit register for FB relative addressing.
INTB is a 20-bit register indicates the start address of an interrupt vector table.
PC, 20 bits wide, indicates the address of an instruction to be executed.
The stack pointer (SP), USP and ISP, are 16 bits wide each.
The U flag of FLG is used to switch between USP and ISP.
SB is a 16-bit register for SB relative addressing.
FLG is a 11-bit register indicating the CPU state.
2.8.1 Carry Flag (C)
2.8.2 Debug Flag (D)
2.8.3 Zero Flag (Z)
2.8.4 Sign Flag (S)
2.8.5 Register Bank Select Flag (B)
2.8.6 Overflow Flag (O)
2.8.7 Interrupt Enable Flag (I)
2.8.8 Stack Pointer Select Flag (U)
2.8.9 Processor Interrupt Priority Level (IPL)
2.8.10 Reserved Bit
The C flag retains a carry, borrow, or shift-out bit that has occurred in the arithmetic logic unit.
The D flag is for debug only. Set to “0”.
The Z flag is set to “1” when an arithmetic operation resulted in 0; otherwise, “0”.
The S flag is set to “1” when an arithmetic operation resulted in a negative value; otherwise, “0”.
The register bank 0 is selected when the B flag is “0”. The register bank 1 is selected when this flag is
set to “1”.
The O flag is set to “1” when the operation resulted in an overflow; otherwise, “0”.
The I flag enables a maskable interrupt.
An interrupt is disabled when the I flag is set to “0”, and are enabled when the I flag is set to “1”. The
I flag is set to “0” when an interrupt request is acknowledged.
ISP is selected when the U flag is set to “0”, USP is selected when the U flag is set to “1”.
The U flag is set to “0” when a hardware interrupt request is acknowledged or the INT instruction of
software interrupt numbers 0 to 31 is executed.
IPL, 3 bits wide, assigns processor interrupt priority levels from level 0 to level 7.
If a requested interrupt has greater priority than IPL, the interrupt is enabled.
When write to this bit, set to “0”. When read, its content is indeterminate.
Jan 27, 2006
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2. Central Processing Unit (CPU)