DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 236

• Manufacturer Part Number: DF71251AD50FPV
• Description: MCU RISC FLASH 32K 8K 64LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Tinyr

Specifications of DF71251AD50FPV

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

9.3.16
TRWER is an 8-bit readable/writable register that enables or disables access to the registers and
counters which have write-protection capability against accidental modification in channels 3 and
4.
• Registers and counters having write-protection capability against accidental modification
Rev. 5.00 Mar. 06, 2009 Page 216 of 770
REJ09B0243-0500
Bit
7 to 1
0
22 registers: TCR_3, TCR_4, TMDR_3, TMDR_4, TIORH_3, TIORH_4, TIORL_3,
TIORL_4, TIER_3, TIER_4, TGRA_3, TGRA_4, TGRB_3, TGRB_4, TOER, TOCR1,
TOCR2, TGCR, TCDR, TDDR, TCNT_3, and TCNT_4.
Bit Name
—
RWE
Timer Read/Write Enable Register (TRWER)
Initial value:
Initial
Value
All 0
1
R/W:
Bit:
R
7
0
-
R/W
R
R/W
R
6
0
-
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
Read/Write Enable
Enables or disables access to the registers which have
write-protection capability against accidental
modification.
0: Disables read/write access to the registers
1: Enables read/write access to the registers
[Clearing condition]
•
R
5
0
-
When 0 is written to the RWE bit after reading
RWE = 1
R
4
0
-
R
3
0
-
R
2
0
-
R
1
0
-
RWE
R/W
0
1