DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 83

• Manufacturer Part Number: DF71251AD50FPV
• Description: MCU RISC FLASH 32K 8K 64LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Tinyr

Specifications of DF71251AD50FPV

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 37
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

4.4
The CPG has the following registers.
For details on the addresses of these registers and the states of these registers in each processing
state, see section 20, List of Registers
Table 4.5
4.4.1
FRQCR is a 16-bit readable/writable register that specifies the frequency division ratios for the
internal clock (Iφ), bus clock (Bφ), peripheral clock (Pφ), and MTU2 clock (MPφ). FRQCR can be
accessed only in words.
FRQCR is initialized to H'36DB only by a power-on reset (except a power-on reset due to a WDT
overflow).
Before making changes to FRQCR, stop clock supply to each module except the CPU, on-chip
ROM, and on-chip-RAM.
Initial value:
Register Name
Frequency control register
Oscillation stop detection
control register
R/W:
Bit:
Register Descriptions
Frequency Control Register (FRQCR)
15
R
0
-
Register Configuration
R/W
14
0
IFC[2:0]
R/W
13
1
R/W
12
1
R/W
Abbrevia-
tion
FRQCR
OSCCR
11
0
BFC[2:0]
R/W
10
1
R/W
9
1
R/W
R/W
R/W
R/W
8
0
PFC[2:0]
Initial Value
H'36DB
H'00
R/W
7
1
R/W
6
1
Rev. 5.00 Mar. 06, 2009 Page 63 of 770
R/W
5
0
-
Address
H'FFFFE800
H'FFFFE814
R/W
4
1
-
R/W
3
1
-
REJ09B0243-0500
R/W
2
0
Access Size
16
8
MPFC[2:0]
R/W
1
1
R/W
0
1