HD64F3644DV Renesas Electronics America, HD64F3644DV Datasheet - Page 114

• Manufacturer Part Number: HD64F3644DV
• Description: IC H8/3644 MCU FLASH 64QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD64F3644DV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 5 Power-Down Modes
System Control Register 2 (SYSCR2)
SYSCR2 is an 8-bit read/write register for power-down mode control.
Upon reset, SYSCR2 is initialized to H'E0.
Bits 7 to 5 Reserved Bits: These bits are reserved; they are always read as 1, and cannot be
modified.
Bit 4 Noise Elimination Sampling Frequency Select (NESEL): This bit selects the frequency
at which the watch clock signal (
relation to the oscillator clock (
2 to 10 MHz, clear NESEL to 0.
Bit 4: NESEL
0
1
Rev. 6.00 Sep 12, 2006 page 92 of 526
REJ09B0326-0600
Bit
Initial value
Read/Write
Sampling rate is
Sampling rate is
Description
7
1
1
6
OSC
W
) generated by the subclock pulse generator is sampled, in
) generated by the system clock pulse generator. When
OSC
OSC
/16
/4
5
1
NESEL
R/W
4
0
DTON
R/W
3
0
MSON
R/W
2
0
R/W
SA1
1
0
(initial value)
R/W
SA0
OSC
0
0
=