UPD78F1174AGF-GAT-AX Renesas Electronics America, UPD78F1174AGF-GAT-AX Datasheet - Page 672

• Manufacturer Part Number: UPD78F1174AGF-GAT-AX
• Description: MCU 16BIT 78K0R/KX3 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1174AGF-GAT-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, EBI/EMI, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

(5) Program status word (PSW)
670
PSW
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 ISP0 and ISP1 flags 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 ISP0 and ISP1 flags. 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 06H.
<7>
IE
<6>
Z
RBS1
<5>
<4>
AC
Figure 17-6. Configuration of Program Status Word
RBS0
<3>
CHAPTER 17 INTERRUPT FUNCTIONS
ISP1
<2>
User’s Manual U18432EJ5V0UD
ISP0
<1>
CY
0
ISP1
IE
0
0
1
1
0
1
Used when normal instruction is executed
After reset
06H
ISP0
Disabled
Enabled
0
1
0
1
Interrupt request acknowledgment enable/disable
Enables interrupt of level 0
(while interrupt of level 1 or 0 is being serviced).
Enables interrupt of level 0 and 1
(while interrupt of level 2 is being serviced).
Enables interrupt of level 0 to 2
(while interrupt of level 3 is being serviced).
Enables all interrupts
(waits for acknowledgment of an interrupt).
Priority of interrupt currently being serviced