參數(shù)資料
型號(hào)： UPD17147CT
廠商： NEC Corp.
英文描述： SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 小，通用4位單晶片微控制器
文件頁(yè)數(shù)： 55/102頁(yè)
文件大?。?/td> 408K
代理商： UPD17147CT
55
μ
PD17145(A1), 17147(A1), 17149(A1)
16.2 Hardware of Interrupt Control Circuit
This section describes each flag of the interrupt control circuit.
(1) Interrupt request flags and interrupt enable flags
An interrupt request flag (IRQ
×××
) is set to 1 when an interrupt request is generated, and automatically
cleared to 0 when interrupt processing is executed.
An interrupt enable flag (IP
×××
) is provided for each interrupt request flag. The corresponding interrupt is
enabled when this flag is “1”, and disabled when the flag is “0”.
(2) EI/DI instruction
Whether an interrupt that has been acknowledged is executed is specified by the EI or DI instruction.
When the EI instruction is executed, an interrupt enable flag (INTE) that enables acknowledging an interrupt
is set to 1. The INTE flag is not registered on the register file. Therefore, the status of this flag cannot be
checked by an instruction.
The DI instruction clears the INTE flag to “0”, disabling all the interrupts.
The INTE flag is also cleared to 0 at reset, and therefore all the interrupts are disabled.
Table 16-2. Interrupt Request Flags and Interrupt Enable Flags
Interrupt Request Flag
Interrupt Request Flag Setting Signal
Interrupt Enable Flag
IRQ
Sets when edge of INT pin input signal is detected.
Edge to be detected is selected by IEGMD0 and IEGMD1
flags.
IP
IRQTM0
Set by coincidence signal from timer 0.
IPTM0
IRQTM1
Set by coincidence signal from timer 1.
IPTM1
IRQBTM
Set by overflow from basic interval timer (reference time
interval signal).
IPBTM
IRQSIO
Set when serial interface completes serial data transfer.
IPSIO
相關(guān)PDF資料
PDF描述
UPD17147CTA1 SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
UPD17149 SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
UPD17149CT SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
UPD17147GT SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
UPD17147GTA1 SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD17147CTA1 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
UPD17147GT 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
UPD17147GTA1 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
UPD17149 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
UPD17149CT 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
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