R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 28

• Manufacturer Part Number: R5F21191SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/19r

Specifications of R5F21191SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x1b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Rev.2.00 Oct 17, 2005
REJ09B0001-0200
1.5 Register Banks
Chapter 1 Overview
The R8C/Tiny has two register banks, each comprising data registers (R0, R1, R2, and R3), address regis-
ters (A0 and A1), and a frame base register (FB). These two register banks are switched by the register
bank select flag (B flag) in the flag register (FLG).
Figure 1.5.1 shows the configuration of the register banks.
Figure 1.5.1 Configuration of Register Banks
Register bank 0 (B flag = 0)
R0
R1
R2
R3
A0
A1
FB
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b15
H
H
b8b7
L
L
b0
R0
R1
R2
R3
A0
A1
FB
Register bank 1 (B flag = 1)
b15
H
H
b8b7
1.5 Register Banks
L
L
b0