DF71251AD50FPV Renesas Electronics America, DF71251AD50FPV Datasheet - Page 41

• 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: -

2.2.3
There are four 32-bit system registers, designated two multiply and accumulate registers (MACH
and MACL), a procedure register (PR), and program counter (PC).
• Multiply and accumulate registers (MACH and MACL)
• Procedure register (PR)
• Program counter (PC)
2.2.4
Table 2.1 lists the initial values of registers after a reset.
Table 2.1
Type of register
General register
Control register
System register
This register stores the results of multiplication and multiply-and-accumulate operation.
This register stores the return-destination address from subroutine procedures.
The PC indicates the point which is four bytes (two instructions) after the current execution
instruction.
System Registers
Initial Values of Registers
Initial Values of Registers
Register
SR
MACH, MACL, PR
R0 to R14
R15 (SP)
GBR
VBR
PC
Default
Undefined
SP value set in the exception handling vector table
I3 to I0: 1111 (H'F)
Reserved bits: 0
Other bits: Undefined
Undefined
H'00000000
Undefined
PC value set in the exception handling vector table
Rev. 5.00 Mar. 06, 2009 Page 21 of 770
REJ09B0243-0500