UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 580
UPD78F0550MA-FAA-AX
Manufacturer Part Number
UPD78F0550MA-FAA-AX
Description
MCU 8BIT 16-SSOP
Manufacturer
Renesas Electronics America
Series
78K0/Kx2-Lr
Datasheet
1.UPD78F0550MA-FAA-AX.pdf
(734 pages)
Specifications of UPD78F0550MA-FAA-AX
Package / Case
*
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Speed
10MHz
Number Of I /o
12
Core Processor
78K/0
Program Memory Type
FLASH
Ram Size
384 x 8
Program Memory Size
4KB (4K x 8)
Data Converters
A/D 4x10b
Oscillator Type
Internal
Peripherals
LVD, POR, PWM, WDT
Connectivity
I²C, LIN, UART/USART
Core Size
8-Bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
UPD78F0550MA-FAA-AX
Manufacturer:
Renesas
Quantity:
800
Part Number:
UPD78F0550MA-FAA-AX
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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(5) Program status word (PSW)
580
The program status word is a register used to hold the instruction execution result and the current status for an
interrupt request. The IE flag that sets maskable interrupt enable/disable and the ISP flag that controls multiple
interrupt servicing are mapped to the PSW.
Besides 8-bit read/write, this register can carry out operations using bit manipulation instructions and dedicated
instructions (EI and DI). When a vectored interrupt request is acknowledged, if the BRK instruction is executed,
the contents of the PSW are automatically saved into a stack and the IE flag is reset to 0. If a maskable interrupt
request is acknowledged, the contents of the priority specification flag of the acknowledged interrupt are
transferred to the ISP flag. The PSW contents are also saved into the stack with the PUSH PSW instruction.
They are restored from the stack with the RETI, RETB, and POP PSW instructions.
Reset signal generation sets PSW to 02H.
PSW
<7>
IE
<6>
Z
RBS1
<5>
<4>
AC
Figure 17-18. Format of Program Status Word
RBS0
<3>
CHAPTER 17 INTERRUPT FUNCTIONS
Preliminary User’s Manual U19111EJ2V1UD
2
0
<1>
ISP
CY
0
ISP
IE
0
1
0
1
Used when normal instruction is executed
After reset
02H
High-priority interrupt servicing (low-priority
interrupt disabled)
Interrupt request not acknowledged, or low-
priority interrupt servicing (all maskable
interrupts enabled)
Disabled
Enabled
Interrupt request acknowledgment enable/disable
Priority of interrupt currently being serviced
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