HD64F3664FY Renesas Electronics America, HD64F3664FY Datasheet - Page 173
HD64F3664FY
Manufacturer Part Number
HD64F3664FY
Description
IC H8 MCU FLASH 32K 48QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.US3664-BAG1.pdf
(446 pages)
Specifications of HD64F3664FY
Core Processor
H8/300H
Core Size
16-Bit
Speed
16MHz
Connectivity
I²C, SCI
Peripherals
PWM, WDT
Number Of I /o
29
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
External
Operating Temperature
-20°C ~ 75°C
Package / Case
48-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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10.4
10.4.1
When bit TMA3 in TMA is cleared to 0, timer A functions as an 8-bit interval timer.
Upon reset, TCA is cleared to H'00 and bit TMA3 is cleared to 0, so up-counting of timer A
resume immediately as an interval timer. The clock input to timer A is selected by bits TMA2 to
TMA0 in TMA; any of eight internal clock signals output by prescaler S can be selected.
After the count value in TCA reaches H'FF, the next clock signal input causes timer A to
overflow, setting bit IRRTA to 1 in interrupt Flag Register 1 (IRR1). If IENTA = 1 in interrupt
enable register 1 (IENR1), a CPU interrupt is requested. At overflow, TCA returns to H'00 and
starts counting up again. In this mode timer A functions as an interval timer that generates an
overflow output at intervals of 256 input clock pulses.
10.4.2
When bit TMA3 in TMA is set to 1, timer A functions as a clock-timer base by counting clock
signals output by prescaler W. When a clock signal is input after the TCA counter value has
become H'FF, timer A overflows and IRRTA in IRR1 is set to 1. At that time, an interrupt request
is generated to the CPU if IENTA in the interrupt enable register 1 (IENR1) is 1. The overflow
period of timer A is set by bits TMA1 and TMA0 in TMA. A choice of four periods is available.
In clock time base operation (TMA3 = 1), setting bit TMA2 to 1 clears both TCA and prescaler W
to H'00.
10.4.3
Setting bit TMOW in port mode register 1 (PMR1) to 1 causes a clock signal to be output at pin
TMOW. Eight different clock output signals can be selected by means of bits TMA7 to TMA5 in
TMA. The system clock divided by 32, 16, 8, or 4 can be output in active mode and sleep mode. A
32.768 kHz signal divided by 32, 16, 8, or 4 can be output in active mode, sleep mode, and
subactive mode.
Operation
Interval Timer Operation
Clock Time Base Operation
Clock Output
Rev. 6.00 Mar. 24, 2006 Page 143 of 412
Section 10 Timer A
REJ09B0142-0600
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