DF38602RFT10 Renesas Electronics America, DF38602RFT10 Datasheet - Page 92

• Manufacturer Part Number: DF38602RFT10
• Description: MCU 3V 16K 32-QFN
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300H SLPr

Specifications of DF38602RFT10

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 10MHz
• Connectivity: I²C, IrDA, SCI, SSU
• Peripherals: POR, PWM, WDT
• Number Of I /o: 13
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F38602RFT10; HD64F38602RFT10

Section 3 Exception Handling
3.8
3.8.1
When word data is accessed in this LSI, the least significant bit of the address is regarded as 0.
Access to the stack always takes place in word size, so the stack pointer (SP: R7) should never
indicate an odd address. To save register values, use PUSH.W Rn (MOV.W Rn, @–SP) or
PUSH.L ERn (MOV.L ERn, @–SP). To restore register values, use POP.W Rn (MOV.W @SP+,
Rn) or POP.L ERn (MOV.L @SP+, ERn).
Setting an odd address in SP may cause a program to crash. An example is shown in figure 3.6.
When CCR contents are saved to the stack during interrupt exception handling or restored when
an RTE instruction is executed, this also takes place in word size. Both the upper and lower bytes
of word data are saved to the stack; on return, the even address contents are restored to CCR while
the odd address contents are ignored.
Rev. 3.00 May 15, 2007 Page 58 of 516
REJ09B0152-0300
SP
→
Notes on Stack Area Use
Usage Notes
[Legend]
PC H :
PC L :
R1L:
SP:
SP set to H'FEFF
Upper byte of program counter
Lower byte of program counter
General register R1L
Stack pointer
Figure 3.6 Operation when Odd Address is Set in SP
BSR instruction
SP
→
Stack accessed beyond SP
PC
PC
H
L
MOV. B R1L, @-R7
SP
→
Contents of PC are lost
R1L
PC
L
H
H'FEFC
H'FEFD
H'FEFF