DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 418

• 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: -

Contention between Overflow/Underflow and Counter Clearing:
If overflow/underflow and counter clearing occur simultaneously, the TCFV/TCFU flag in TSR is
not set and TCNT clearing takes priority. Figure 12.54 shows the operation timing when a TGR
compare match is specified as the clearing source, and H'FFFF is set in TGR.
Contention between TCNT Write and Overflow/Underflow:
If there is an up-count or down-count in the T2 state of a TCNT write cycle and
overflow/underflow occurs, the TCNT write takes priority and the TCFV/TCFU flag in TSR is not
set. Figure 12.55 shows the operation timing when there is contention between TCNT write and
overflow.
Rev.2.00 May. 28, 2009 Page 378 of 732
REJ09B0059-0200
TCNT input
clock
TCNT
Counter
clear signal
TGF
TCFV
Figure 12.54 Contention between Overflow and Counter Clearing
Figure 12.55 Contention between TCNT Write and Overflow
φ
Address
Write signal
TCNT
TCFV flag
φ
H'FFFF
Disabled
H'FFFF
TCNT write cycle
T
TCNT address
1
H'0000
T
2
M
TCNT write data