HD6417144F50V Renesas Electronics America, HD6417144F50V Datasheet - Page 435
![IC SUPERH MCU ROMLESS 112QFP](/photos/12/40/124045/hd6417144f50v_sml.jpg)
HD6417144F50V
Manufacturer Part Number
HD6417144F50V
Description
IC SUPERH MCU ROMLESS 112QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7144r
Datasheet
1.HD64F7144F50V.pdf
(932 pages)
Specifications of HD6417144F50V
Core Processor
SH-2
Core Size
32-Bit
Speed
50MHz
Connectivity
EBI/EMI, I²C, SCI
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
74
Program Memory Type
ROMless
Ram Size
8K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
112-QFP
For Use With
HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)EDK7145 - DEV EVALUATION KIT SH7145
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417144F50V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 435 of 932
- Download datasheet (6Mb)
12.6
12.6.1
The watchdog timer’s TCNT, TCSR, and RSTCSR registers differ from other registers in being
more difficult to write to. The procedures for writing to and reading these registers are given
below.
Writing to TCNT and TCSR: These registers must be written by a word transfer instruction.
They cannot be written by byte transfer instructions.
TCNT and TCSR both have the same write address. The write data must be contained in the lower
byte of the written word. The upper byte must be H'5A (for TCNT) or H'A5 (for TCSR) (figure
12.6). This transfers the write data from the lower byte to TCNT or TCSR.
Writing to RSTCSR: RSTCSR must be written by a word access to address H'FFFF8612. It
cannot be written by byte transfer instructions.
Procedures for writing 0 to WOVF (bit 7) and for writing to RSTE (bit 6) and RSTS (bit 5) are
different, as shown in figure 12.7.
To write 0 to the WOVF bit, the write data must be H'A5 in the upper byte and H'00 in the lower
byte. This clears the WOVF bit to 0. The RSTE and RSTS bits are not affected. To write to the
RSTE and RSTS bits, the upper byte must be H'5A and the lower byte must be the write data. The
values of bits 6 and 5 of the lower byte are transferred to the RSTE and RSTS bits, respectively.
The WOVF bit is not affected.
Notes on Register Access
Usage Notes
• Writing to TCNT
• Writing to TCSR
Address: H'FFFF8610
Address: H'FFFF8610
Figure 12.6 Writing to TCNT and TCSR
15
15
H'5A
H'A5
Rev.4.00 Mar. 27, 2008 Page 389 of 882
8
8
7
7
Write data
Write data
12. Watchdog Timer
REJ09B0108-0400
0
0
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