HD6473837FV Renesas Electronics America, HD6473837FV Datasheet - Page 99

• Manufacturer Part Number: HD6473837FV
• Description: IC H8/3837 MCU FLASH 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Lr

Specifications of HD6473837FV

• Core Processor: H8/300L
• Core Size: 8-Bit
• Speed: 5MHz
• Connectivity: SCI
• Peripherals: LCD, PWM
• Number Of I /o: 84
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: OTP
• Eeprom Size: -
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-BQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

When CCR contents are saved to the stack during interrupt exception handling or restored when
RTE 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.
3.4.2
When a port mode register is rewritten to switch the functions of external interrupt pins, the
following points should be observed.
When an external interrupt pin function is switched by rewriting the port mode register that
controls these pins (IRQ
at the time the pin function is switched, even if no valid interrupt is input at the pin. Be sure to
clear the interrupt request flag to 0 after switching pin functions. Table 3.5 shows the conditions
under which interrupt request flags are set to 1 in this way.
82
SP
Notation:
PC
PC
R1L:
SP:
H
L
:
:
SP set to H'FEFF
Notes on Rewriting Port Mode Registers
Upper byte of program counter
Lower byte of program counter
General register R1L
Stack pointer
Figure 3.7 Operation when Odd Address is Set in SP
BSR instruction
4
to IRQ
0
SP
, and WKP
Stack accessed beyond SP
7
PC
PC
to WKP
H
L
0
), the interrupt request flag may be set to 1
MOV. B R1L, @–R7
SP
Contents of PC are lost
PC
R1L
L
H
H'FEFC
H'FEFD
H'FEFF