DF2437FV Renesas Electronics America, DF2437FV Datasheet - Page 275

• 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: -

9.3.1
DACNT is a 14-bit readable/writable up-counter. The input clock is selected by the CKS bit in
DACR. DACNT functions as the timebase for both PWMX (D/A) channels. When a channel
operates with 14-bit accuracy, it uses all DACNT bits. When a channel operates with 12-bit
accuracy, it uses the lower 12 bits and ignores the upper two bits. DACNT cannot be accessed in
8-bit units. DACNT should always be accessed in 16-bit units. For details, see section 9.4, Bus
Master Interface.
• DACNTH
• DACNTL
Bit
7
to
0
Bit
7
to
2
1
0
Bit Name
UC7
to
UC0
Bit Name
UC8
to
UC13
⎯
REGS
PWMX (D/A) Counters H and L (DACNTH and DACNTL)
Initial Value
All 0
Initial Value
All 0
1
1
R/W
R/W
R/W
R/W
R/W
R/W
Description
Lower Up-Counter
Description
Upper Up-Counter
Reserved
This bit is always read as 1 and cannot be modified.
Register Select
DADRA and DACR, and DADRB and DACNT, are
located at the same addresses. The REGS bit specifies
which registers can be accessed. When changing the
register to be accessed, set this bit in advance.
0: DADRA and DADRB can be accessed
1: DACR and DACNT can be accessed
Rev.2.00 May. 28, 2009 Page 235 of 732
REJ09B0059-0200