參數(shù)資料
型號： 73S1215F-44IM/F/P
廠商： Maxim Integrated Products
文件頁數(shù)： 65/136頁
文件大?。?/td> 0K
描述： IC SMART CARD READER PROG 44-QFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 260
系列： 73S12xx
核心處理器： 80515
芯體尺寸： 8-位
速度： 24MHz
連通性： I²C，智能卡，UART/USART，USB
外圍設(shè)備： LED，POR，WDT
輸入/輸出數(shù)： 9
程序存儲器容量： 64KB（64K x 8）
程序存儲器類型： 閃存
RAM 容量： 2K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 44-VFQFN 裸露焊盤
包裝： 管件
73S1215F Data Sheet
DS_1215F_003
34
Rev. 1.4
1.7.3.1
Interrupt Overview
When an interrupt occurs, the MPU will vector to the predetermined address as shown in Table 33. Once
the interrupt service has begun, it can only be interrupted by a higher priority interrupt. The interrupt
service is terminated by a return from the REIT instruction. When a RETI is performed, the processor will
return to the instruction that would have been next when the interrupt occurred.
When the interrupt condition occurs, the processor will also indicate this by setting a flag bit. This bit is
set regardless of whether the interrupt is enabled or disabled. Each interrupt flag is sampled once per
machine cycle, then samples are polled by the hardware. If the sample indicates a pending interrupt
when the interrupt is enabled, then the interrupt request flag is set. On the next instruction cycle, the
interrupt will be acknowledged by hardware forcing an LCALL to the appropriate vector address.
Interrupt response will require a varying amount of time depending on the state of the MPU when the
interrupt occurs. If the MPU is performing an interrupt service with equal or greater priority, the new
interrupt will not be invoked. In other cases, the response time depends on the current instruction. The
fastest possible response to an interrupt is 7 machine cycles. This includes one machine cycle for
detecting the interrupt and six cycles to perform the LCALL.
1.7.3.2
Special Function Registers for Interrupts
Interrupt Enable 0 Register (IEN0): 0xA8
0x00
Table 20: The IEN0 Register
MSB
LSB
EAL
WDT
–
ES0
ET1
EX1
ET0
EX0
Bit
Symbol
Function
IEN0.7
EAL
EAL = 0 – disable all interrupts.
IEN0.6
WDT
Not used for interrupt control.
IEN0.5
–
IEN0.4
ES0
ES0 = 0 – disable serial channel 0 interrupt.
IEN0.3
ET1
ET1 = 0 – disable timer 1 overflow interrupt.
IEN0.2
EX1
EX1 = 0 – disable external interrupt 1.
IEN0.1
ET0
ET0 = 0 – disable timer 0 overflow interrupt.
IEN0.0
EX0
EX0 = 0 – disable external interrupt 0.
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