HD64F3644PV Renesas Electronics America, HD64F3644PV Datasheet - Page 107

• Manufacturer Part Number: HD64F3644PV
• Description: IC H8/3644 MCU FLASH 32K 64SDIP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD64F3644PV

• 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: -20°C ~ 75°C
• Package / Case: 64-SDIP (0.750", 19.05mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Figure 4.8 shows the equivalent circuit of the 32.768-kHz crystal resonator.
Pin Connection when Not Using Subclock: When the subclock is not used, connect pin X
V
4.4
The H8/3644 Group is equipped with two on-chip prescalers having different input clocks
(prescaler S and prescaler W). Prescaler S is a 13-bit counter using the system clock ( ) as its
input clock. Its prescaled outputs provide internal clock signals for on-chip peripheral modules.
Prescaler W is a 5-bit counter using a 32.768-kHz signal divided by 4 (
prescaled outputs are used by timer A as a time base for timekeeping.
Prescaler S (PSS): Prescaler S is a 13-bit counter using the system clock ( ) as its input clock. It
is incremented once per clock period.
Prescaler S is initialized to H'0000 by a reset, and starts counting on exit from the reset state.
CC
and leave pin X
X
1
Prescalers
Figure 4.8 Equivalent Circuit of 32.768-kHz Crystal Resonator
2
Figure 4.9 Pin Connection when not Using Subclock
open, as shown in figure 4.9.
L
S
C
S
X
X
1
2
C
0
C = 1.5 pF (typ.)
R = 14 k
f
Crystal resonator:
W
0
S
= 32.768 kHz
R
Rev. 6.00 Sep 12, 2006 page 85 of 526
S
V
Open
CC
Section 4 Clock Pulse Generators
(typ.)
MX38T
(Nihon Denpa Kogyo)
W
/4) as its input clock. Its
X
2
REJ09B0326-0600
1
to