M38588GCSP#U0 Renesas Electronics America, M38588GCSP#U0 Datasheet - Page 20

• Manufacturer Part Number: M38588GCSP#U0
• Description: IC 740/3858 MCU QZ-ROM 42DIP
• Manufacturer: Renesas Electronics America
• Series: 740/38000r

Specifications of M38588GCSP#U0

• Core Processor: 740
• Core Size: 8-Bit
• Speed: 12.5MHz
• Connectivity: SIO, UART/USART
• Peripherals: PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: QzROM
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 9x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 42-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

3858 Group
INTERRUPTS
The 3858 group's interrupts are a type of vector and occur by 16
sources among 19 sources: eight external, ten internal, and one
software.
Interrupt Control
Each interrupt is controlled by an interrupt request bit, an interrupt
enable bit, and the interrupt disable flag except for the software in-
terrupt set by the BRK instruction. An interrupt occurs if the
corresponding interrupt request and enable bits are “1” and the in-
terrupt disable flag is “0”.
Interrupt enable bits can be set or cleared by software.
Interrupt request bits can be cleared by software, but cannot be
set by software.
The reset and the BRK instruction cannot be disabled with any
flag or bit. The I (interrupt disable) flag disables all interrupts ex-
cept the reset and the BRK instruction interrupt.
When several interrupt requests occur at the same time, the inter-
rupts are received according to priority.
Interrupt Operation
By acceptance of an interrupt, the following operations are auto-
matically performed:
1. The contents of the program counter and the processor status
2. The interrupt disable flag is set and the corresponding interrupt
3. The interrupt jump destination address is read from the vector
Interrupt Source Selection
Which of each combination of the following interrupt sources can
be selected by the interrupt source selection register (address
0039
1. INT
2. Timer Z1 or CNTR
3. Timer Z2 or CNTR
4. CNTR
5. CNTR
REJ03B0139-0111
page 18 of 73
register are automatically pushed onto the stack.
request bit is cleared.
table into the program counter.
16
3
).
or Serial I/O2
0
1
or CNTR
or CNTR
2
3
2
3
Rev.1.11
Dec 18, 2008