HD64F36077GHV Renesas Electronics America, HD64F36077GHV Datasheet - Page 300

• Manufacturer Part Number: HD64F36077GHV
• Description: 16BIT MCU FLASH 56K, SMD, LQFP64
• Manufacturer: Renesas Electronics America

Specifications of HD64F36077GHV

• No. Of I/o's: 47
• Ram Memory Size: 4KB
• Cpu Speed: 20MHz
• No. Of Timers: 4
• Digital Ic Case Style: LQFP
• Supply Voltage Range: 4.5V
• Core Size: 16bit
• Program Memory Size: 56KB
• Oscillator Type: External Only
• Controller Family/series: H8/300H
• Peripherals: ADC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Section 14 Watchdog Timer
14.2.2
TCWD is an 8-bit readable/writable up-counter. When TCWD overflows from H'FF to H'00, the
internal reset signal is generated and the WRST bit in TCSRWD is set to 1. TCWD is initialized to
H'00.
14.2.3
TMWD selects the input clock.
[Legend] X: Don't care.
Rev. 1.00 Sep. 16, 2005 Page 270 of 490
REJ09B0216-0100
Bit
7 to 4
3
2
1
0
Bit Name

CKS3
CKS2
CKS1
CKS0
Timer Counter WD (TCWD)
Timer Mode Register WD (TMWD)
Initial
Value
All 1
1
1
1
1
R/W

R/W
R/W
R/W
R/W
Description
Reserved
These bits are always read as 1.
Clock Select 3 to 0
Select the clock to be input to TCWD.
1000: Internal clock: counts on φ/64
1001: Internal clock: counts on φ/128
1010: Internal clock: counts on φ/256
1011: Internal clock: counts on φ/512
1100: Internal clock: counts on φ/1024
1101: Internal clock: counts on φ/2048
1110: Internal clock: counts on φ/4096
1111: Internal clock: counts on φ8192
0XXX: WDT dedicated internal oscillator
For the overflow periods of the WDT dedicated internal
oscillator, see section 22, Electrical Characteristics.