HD64F7051SFJ20V Renesas Electronics America, HD64F7051SFJ20V Datasheet - Page 388
![MCU 5V 256K J-TEMP PB-FREE QFP-1](/photos/28/62/286212/168-bqfp_sml.jpg)
HD64F7051SFJ20V
Manufacturer Part Number
HD64F7051SFJ20V
Description
MCU 5V 256K J-TEMP PB-FREE QFP-1
Manufacturer
Renesas Electronics America
Series
SuperH® SH7050r
Datasheet
1.HD64F7050SFJ20V.pdf
(843 pages)
Specifications of HD64F7051SFJ20V
Core Processor
SH-2
Core Size
32-Bit
Speed
20MHz
Connectivity
EBI/EMI, SCI
Peripherals
DMA, WDT
Number Of I /o
102
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
10K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
168-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD64F7051SFJ20V
Manufacturer:
RENESAS
Quantity:
101
Part Number:
HD64F7051SFJ20V
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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Section 12 Watchdog Timer (WDT)
12.4
12.4.1
If a timer counter increment clock pulse is generated during the T
TCNT, the write takes priority and the timer counter is not incremented (figure 12.8).
12.4.2
If the values of bits CKS2 to CKS0 are altered while the WDT is running, the count may
increment incorrectly. Always stop the watchdog timer (by clearing the TME bit to 0) before
changing the values of bits CKS2 to CKS0.
12.4.3
To prevent incorrect operation, always stop the watchdog timer (by clearing the TME bit to 0)
before switching between interval timer mode and watchdog timer mode.
Rev. 5.00 Jan 06, 2006 page 366 of 818
REJ09B0273-0500
Notes on Use
TCNT Write and Increment Contention
Changing CKS2 to CKS0 Bit Values
Changing between Watchdog Timer/Interval Timer Modes
write signal
input clock
Address
Internal
Figure 12.8 Contention between TCNT Write and Increment
TCNT
TCNT
CK
T
1
TCNT write cycle
TCNT address
N
T
2
Counter write data
T
3
3
state of a write cycle to the
M
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