R5F21257SNFP#U0 Renesas Electronics America, R5F21257SNFP#U0 Datasheet - Page 294

• 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 14.118 TRECR1 Register in Real-Time Clock Mode
Figure 14.119 Definition of Time Representation
Timer RE Control Register 1
b7 b6 b5 b4 b3 b2
NOTE:
1.
PM bit and H12_H24 bits: Bits in TRECR1 register
The above applies to the case when count starts from a.m. 0 on Sunday.
TREHR Register
Contents of PM bit
Contents in TREWK register
TREHR Register
Contents of PM bit
Contents in TREWK register
Contents of
Contents of
This bit is automatically modified w hile timer RE counts.
Feb 29, 2008
b1 b0
H12_H24 bit = 1
H12_H24 bit = 0
H12_H24 bit = 1
H12_H24 bit = 0
(24-hour mode)
(12-hour mode)
(24-hour mode)
(12-hour mode)
Bit Symbol
H12_H24
TSTART
TRECR1
TRERST
TOENA
Symbol
TCSTF
(b0)
INT
PM
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18
0
0
6
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
Timer RE count status flag
TREO pin output enable bit
Interrupt request timing bit
Timer RE reset bit
A.m./p.m. bit
Operating mode select bit
Timer RE count start bit
19
1
1
7
000 (Sunday)
1 (p.m.)
20
2
2
8
Address
Bit Name
21
011Ch
3
3
9
22
10
4
4
Date changes
0 (a.m.)
23
11
5
5
6
6
0
0
001 (Monday)
0 (a.m.)
0 : Count stopped
1 : Counting
0 : Disable clock output
1 : Enable clock output
Set to 1 in real-time clock mode.
When setting this bit to 0, after setting it to 1, the
follow ings w ill occur.
• Registers TRESEC, TREMIN, TREHR, TREWK,
• Bits TCSTF, INT, PM, H12_H24, and TSTART
• The 8-bit counter is set to 00h and
When the H12_H24 bit is set to 0
(12-hour mode)(1)
0 : a.m.
1 : p.m.
When the H12_H24 bit is set to 1 (24-hour
mode), its value is undefined.
0 : 12-hour mode
1 : 24-hour mode
0 : Count stops
1 : Count starts
7
7
1
1
and TRECR2 are set to 00h.
in the TRECR1 register are set to 0.
the 4-bit counter is set to 0h.
000 (Sunday)
8
8
2
2
9
9
3
3
10
10
After Reset
11
11
Noon
Function
00h
12
0
13
1
⋅⋅⋅
⋅⋅⋅
⋅⋅⋅
⋅⋅⋅
14
1 (p.m.)
2
15
3
16
4
17
5
14. Timers
RW
RW
RW
RW
RW
RW
RW
RO
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