DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 236
DF71251AD50FPV
Manufacturer Part Number
DF71251AD50FPV
Description
MCU RISC FLASH 32K 8K 64LQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH Tinyr
Datasheet
1.DF71243N50FPV.pdf
(794 pages)
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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF71251AD50FPV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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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
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