DF36054GFPJV Renesas Electronics America, DF36054GFPJV Datasheet - Page 181

• 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: -

10.4
10.4.1
When bit TMB17 in TMB1 is cleared to 0, timer B1 functions as an 8-bit interval timer. Upon
reset, TCB1 is cleared to H'00 and bit TMB17 is cleared to 0, so up-counting and interval timing
resume immediately. The operating clock of the timer B1 is selected from seven internal clock
signals output by prescaler S, or an external clock input at pin TMB1. The selection is made by
bits TMB12 to TMB10 in TMB1.
After the count value in TMB1 reaches H'FF, the next clock signal input causes timer B1 to
overflow, setting flag IRRTB1 in IRR2 to 1. If IENTB1 in IENR2 is 1, an interrupt is requested to
the CPU.
At overflow, TCB1 returns to H'00 and starts counting up again. During interval timer operation
(TMB17 = 0), when a value is set in TLB1, the same value is set in TCB1.
10.4.2
Setting bit TMB17 in TMB1 to 1 causes timer B1 to function as an 8-bit auto-reload timer. When
a reload value is set in TLB1, the same value is loaded into TCB1, becoming the value from which
TCB1 starts its count. After the count value in TCB1 reaches H'FF, the next clock signal input
causes timer B1 to overflow. The TLB1 value is then loaded into TCB1, and the count continues
from that value. The overflow period can be set within a range from 1 to 256 input clocks,
depending on the TLB1 value.
The clock sources and interrupts in auto-reload mode are the same as in interval mode. In auto-
reload mode (TMB17 = 1), when a new value is set in TLB1, the TLB1 value is also loaded into
TCB1.
10.4.3
Timer B1 can operate as an event counter in which TMIB1 is set to an event input pin. External
event counting is selected by setting bits TMB12 to TMB10 in TMB1 to 1. TCB1 counts up at
rising or falling edge of an external event signal input at pin TMB1.
When timer B1 is used to count external event input, bit IRQ1 in PMR1 should be set to 1 and
IEN1 in IENR1 should be cleared to 0 to disable IRQ1 interrupt requests.
Operation
Interval Timer Operation
Auto-Reload Timer Operation
Event Counter Operation
Rev. 4.00 Mar. 15, 2006 Page 147 of 556
Section 10 Timer B1
REJ09B0026-0400