HD64F38024DV Renesas Electronics America, HD64F38024DV Datasheet - Page 319

• Manufacturer Part Number: HD64F38024DV
• Description: IC H8/SLP MCU FLASH 80QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300L SLPr

Specifications of HD64F38024DV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI
• Peripherals: LCD, PWM, WDT
• Number Of I /o: 51
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

9.5.5
Internal Clock Switching and TCG Operation
Depending on the timing, TCG may be incremented by a switch between different internal clock
sources. Table 9.13 shows the relation between internal clock switchover timing (by write to bits
CKS1 and CKS0) and TCG operation.
When TCG is internally clocked, an increment pulse is generated on detection of the falling edge
of an internal clock signal, which is divided from the system clock (φ) or subclock (φw). For this
reason, in a case like No. 3 in table 9.13 where the switch is from a high clock signal to a low
clock signal, the switchover is seen as a falling edge, causing TCG to increment.
Table 9.13 Internal Clock Switching and TCG Operation
No.
1
2
Clock Levels Before and After
Modifying Bits CKS1 and CKS0
Goes from low level to low level
Goes from low level to high level
Application Notes
TCG Operation
Clock before
switching
Clock after
switching
Count
clock
TCG
Clock before
switching
Clock after
switching
Count
clock
TCG
Rev. 8.00 Mar. 09, 2010 Page 297 of 658
N
N
Write to CKS1 and CKS0
N+1
Write to CKS1 and CKS0
N+1
REJ09B0042-0800
Section 9 Timers
N+2