DF36034GFPJV Renesas Electronics America, DF36034GFPJV Datasheet - Page 421
DF36034GFPJV
Manufacturer Part Number
DF36034GFPJV
Description
MCU 3/5V 32K J TEMP PB-FREE 64LQ
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Specifications of DF36034GFPJV
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
-
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Section 17 Subsystem Timer (Subtimer)
17.4
Count Operation
The subtimer has an 8-bit readable/writable down counter, SBTDCNT. When any value ranging
from H 00 to H FF is written to SBTDCNT and the START bit in SBTCTL is set to 1, the
subtimer starts counting down from the configured value in SBTDCNT. When an underflow
occurs at H'00, the subtimer requests an interrupt to the CPU. At the end of the exception
handling, the subtimer starts counting down again from the configured value written in
SBTDCNT. If another value is written in SBTDCNT, the subtimer starts counting down from the
rewritten value. Therefore, the underflow cycle can be set in the range from 1 to 256 input clocks
according to the configured value in SBTDCNT. Figure 17.4 shows an example of the subtimer
operation and figure 17.5 shows the flowchart.
Clocks are supplied to the entire chip by setting the SYSCKS bit in SBTCTL to 1. When the
SYSCKS bit is cleared to 0, clock supply to the entire chip is disabled and only the subtimer
operates.
(Example) When is 32 kHz and the underflow cycle is 100 ms:
3
32 10
-3
100 10
= 25
128
Therefore, set 25 (H 19) in SBTDCNT.
Rev. 4.00 Mar. 15, 2006 Page 387 of 556
REJ09B0026-0400
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