R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 172

• Manufacturer Part Number: R5F21257SNFP#U0
• Description: IC R8C/25 MCU FLASH 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21257SNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/24 Group, R8C/25 Group
Rev.3.00
REJ09B0244-0300
Figure 14.15
Timer RB Secondary Register
Timer RB Prescaler Register
Timer RB Primary Register
b7
NOTE:
b7
NOTES:
b7
NOTES:
1.
2.
3.
4. To w rite to the TRBSC register, perform the follow ing steps.
1. When the TSTOP bit in the TRBCR register is set to 1, the TRBPRE register is set to FFh.
1.
2. When the TSTOP bit in the TRBCR register is set to 1, the TRBPR register is set to FFh.
The values of registers TRBPR and TRBSC are reloaded to the counter alternately and counted.
The count value can be read out by reading the TRBPR register even w hen the secondary period is being counted.
When the TSTOP bit in the TRBCR register is set to 1, the TRBSC register is set to FFh.
(1) Write the value to the TRBSC register.
(2) Write the value to the TRBPR register. (If the value does not change, w rite the same value second time.)
The values of registers TRBPR and TRBSC are reloaded to the counter alternately and counted.
Feb 29, 2008
Registers TRBPRE, TRBSC, and TRBPR
b0
b0
b0
Timer mode
Programmable w aveform
generation mode
Programmable one-shot
generation mode
Programmable w ait one-shot
generation mode
Timer mode
Programmable w aveform
generation mode
Programmable one-shot
generation mode
Programmable w ait one-shot
generation mode
Timer mode
Programmable w aveform
generation mode
Programmable one-shot
generation mode
Programmable w ait one-shot
generation mode
Page 153 of 485
(2)
(1)
TRBPRE
Symbol
TRBSC
Symbol
Symbol
TRBPR
Mode
Mode
Mode
(3, 4)
Counts an internal count source or timer RA
underflow s
Counts an internal count source or timer RA
underflow s
Counts an internal count source or timer RA
underflow s
Counts an internal count source or timer RA
underflow s
Disabled
Counts timer RB prescaler underflow s
Disabled
Counts timer RB prescaler underflow s
(one-shot w idth is counted)
Counts timer RB prescaler underflow s
Counts timer RB prescaler underflow s
Counts timer RB prescaler underflow s
(one-shot w idth is counted)
Counts timer RB prescaler underflow s
(w ait period w idth is counted)
Address
Address
Address
Function
Function
Function
010Dh
010Ch
010Eh
(1)
(1)
Setting Range
Setting Range
Setting Range
After Reset
After Reset
After Reset
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
00h to FFh
FFh
FFh
FFh
14. Timers
WO
WO
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
—
—
(2)
(2)