DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 384

• Manufacturer Part Number: DF2437FV
• Description: IC H8S/2437 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of DF2437FV

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

12.5.2
In synchronous operation, the values in a number of TCNT counters can be rewritten
simultaneously (synchronous presetting). Also, a number of TCNT counters can be cleared
simultaneously by making the appropriate setting in TCR (synchronous clearing). Synchronous
operation enables TGR to be incremented with respect to a single time base. Channels 0 to 2 can
all be designated for synchronous operation.
Example of Synchronous Operation Setting Procedure:
Figure 12.14 shows an example of the synchronous operation setting procedure.
Rev.2.00 May. 28, 2009 Page 344 of 732
REJ09B0059-0200
[1]
[2]
[3]
[4]
[5]
<Synchronous presetting>
Synchronous Operation
Synchronous presetting
Synchronous operation
Set 1 to the SYNC bits in TSYR corresponding to the channels to be designated for synchronous
operation.
When TCNT of any of the channels designated for synchronous operation is
written to, the same value is simultaneously written to the other TCNT.
Use bits CCLR2 to CCLR0 in TCR to specify TCNT clearing by input capture/output compare,
etc.
Use bits CCLR2 to CCLR0 in TCR to designate synchronous clearing for the counter clearing
source.
Set 1 to the CST bits in TSTR for the relevant channels, to start the count operation.
Figure 12.14 Example of Synchronous Operation Setting Procedure
Set synchronous
Set TCNT
operation
selection
[1]
[2]
Synchronous clearing
<Counter clearing>
source generation
clearing source
Select counter
Start counting
channel?
Clearing
Yes
No
[3]
[5]
<Synchronous clearing>
Set synchronous
counter clearing
Start counting
[4]
[5]