M38503G4AFP#U1 Renesas Electronics America, M38503G4AFP#U1 Datasheet - Page 10

• Manufacturer Part Number: M38503G4AFP#U1
• Description: IC 740/3850 MCU QZ-ROM 42SSOP
• Manufacturer: Renesas Electronics America
• Series: 740/38000r

Specifications of M38503G4AFP#U1

• Core Processor: 740
• Core Size: 8-Bit
• Speed: 12.5MHz
• Connectivity: SIO, UART/USART
• Peripherals: PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: QzROM
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 9x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 42-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

3850 Group (Spec.A QzROM version)
Rev.2.13
REJ03B0125-0213
Fig 6.
Table 5
Accumulator
Processor status register
Push return
address
on stack
POP return
address from
stack
Register push and pop at interrupt generation and subroutine call
Push and pop instructions of accumulator or processor status register
Note : Condition for acceptance of an interrupt → Interrupt enable flag is “1”
Apr 17, 2009
M(S)←(PC
(S)←(S) − 1
M(S)←(PC
(
(S)←(S) + 1
(PC
(S)←(S) + 1
(PC
S
Execute RTS
Subroutine
)
←
L
H
)←M(S)
(
)←M(S)
S
)
−
Interrupt request
1
H
L
Page 8 of 56
)
)
(Note)
On-going Routine
Execute JSR
Push instruction to stack
Interrupt disable flag is “0”
PHA
PHP
Service Routine
M(S)←(PC
(S)←(S) − 1
(S)←(S) + 1
(S)←(S) + 1
(PC
(S)←(S) + 1
(PC
M(S)←(PC
(S)←(S) − 1
(S)←(S) − 1
M(S)←(PS)
(PS)←M(S)
Execute RTI
Interrupt
L
H
)←M(S)
)←M(S)
H
L
)
)
Pop instruction from stack
Push return address
on stack
Push contents of processor
status register on stack
POP contents of processor
status register from stack
POP return
address from stack
I Flag is set from “0” to “1”
Fetch the jump vector
PLA
PLP