UPD78F1201MC-CAB-AX Renesas Electronics America, UPD78F1201MC-CAB-AX Datasheet - Page 892
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UPD78F1201MC-CAB-AX
Manufacturer Part Number
UPD78F1201MC-CAB-AX
Description
MCU 16BIT 78K0R/LX3 30-SSOP
Manufacturer
Renesas Electronics America
Series
78K0R/Ix3r
Datasheet
1.UPD78F1201MC-CAB-AX.pdf
(1067 pages)
Specifications of UPD78F1201MC-CAB-AX
Core Processor
78K/0R
Core Size
16-Bit
Speed
40MHz
Connectivity
3-Wire SIO, I²C, LIN, UART/USART
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
21
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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17.4.2 Software interrupt request acknowledgment
disabled.
status word (PSW), then program counter (PC), the IE flag is reset (0), and the contents of the vector table (0007EH,
0007FH) are loaded into the PC and branched.
17.4.3 Multiple interrupt servicing
(IE = 1). When an interrupt request is acknowledged, interrupt request acknowledgment becomes disabled (IE = 0).
Therefore, to enable multiple interrupt servicing, it is necessary to set (1) the IE flag with the EI instruction during
interrupt servicing to enable interrupt acknowledgment.
interrupt priority control. Two types of priority control are available: default priority control and programmable priority
control. Programmable priority control is used for multiple interrupt servicing.
currently being serviced is generated, it is acknowledged for multiple interrupt servicing. If an interrupt with a priority
lower than that of the interrupt currently being serviced is generated during interrupt servicing, it is not acknowledged
for multiple interrupt servicing. Interrupt requests that are not enabled because interrupts are in the interrupt disabled
state or because they have a lower priority are held pending. When servicing of the current interrupt ends, the
pending interrupt request is acknowledged following execution of at least one main processing instruction execution.
shows multiple interrupt servicing examples.
890
A software interrupt acknowledge is acknowledged by BRK instruction execution. Software interrupts cannot be
If a software interrupt request is acknowledged, the contents are saved into the stacks in the order of the program
Restoring from a software interrupt is possible by using the RETB instruction.
Multiple interrupt servicing occurs when another interrupt request is acknowledged during execution of an interrupt.
Multiple interrupt servicing does not occur unless the interrupt request acknowledgment enabled state is selected
Moreover, even if interrupts are enabled, multiple interrupt servicing may not be enabled, this being subject to
In the interrupt enabled state, if an interrupt request with a priority equal to or higher than that of the interrupt
Table 17-5 shows relationship between interrupt requests enabled for multiple interrupt servicing and Figure 17-10
Caution Do not use the RETI instruction for restoring from the software interrupt.
CHAPTER 17 INTERRUPT FUNCTIONS
User’s Manual U19678EJ1V1UD
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