DF36054GFPJV Renesas Electronics America, DF36054GFPJV Datasheet - Page 110

• Manufacturer Part Number: DF36054GFPJV
• Description: MCU 3/5V 32K J-TEMP PB-FREE 64-L
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300H Tinyr

Specifications of DF36054GFPJV

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SSU
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 45
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 5 Clock Pulse Generators
5.2
5.2.1
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. In standby mode, subactive mode, and subsleep mode, the system clock pulse
generator stops. Prescaler S also stops and is initialized to H'0000. The CPU cannot read or write
prescaler S. The output from prescaler S is shared by the on-chip peripheral modules. The divider
ratio can be set separately for each on-chip peripheral function. In active mode and sleep mode,
the clock input to prescaler S is determined by the division ratio designated by the MA2 to MA0
bits in SYSCR2.
5.3
5.3.1
Resonator characteristics are closely related to board design and should be carefully evaluated by
the user, referring to the examples shown in this section. Resonator circuit constants will differ
depending on the resonator element, stray capacitance in its interconnecting circuit, and other
factors. Suitable constants should be determined in consultation with the resonator element
manufacturer. Design the circuit so that the resonator element never receives voltages exceeding
its maximum rating.
5.3.2
When using a crystal resonator (ceramic resonator), place the resonator and its load capacitors as
close as possible to the OSC
resonator circuit to prevent induction from interfering with correct oscillation (see figure 5.7).
Rev. 4.00 Mar. 15, 2006 Page 76 of 556
REJ09B0026-0400
Prescaler
Prescaler S
Usage Notes
Note on Resonators
Notes on Board Design
Figure 5.7 Example of Incorrect Board Design
1
Avoid
and OSC
OSC
OSC
2
pins. Other signal lines should be routed away from the
1
2
Signal A
Signal B
C
C
1
2