参数资料
| 型号： | 71M6521FE-DB |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 33/107页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO FOR 71M6521FE |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | 电源管理，电度表/功率表 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | 71M6521 |
| 已供物品： | 2 个板，线缆，CD，电源 |
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71M6521DE/DH/FE Data Sheet
Interrupt Request register ( IRCON )
MSB
LSB
EX6
IEX5
IEX4
IEX3
IEX2
Table 44: The IRCON Register
Bit
IRCON.7
IRCON.6
IRCON.5
IRCON.4
IRCON.3
IRCON.2
IRCON.1
IRCON.0
Symbol
-
-
IEX6
IEX5
IEX4
IEX3
IEX2
-
Function
External interrupt 6 edge flag
External interrupt 5 edge flag
External interrupt 4 edge flag
External interrupt 3 edge flag
External interrupt 2 edge flag
Table 45: The IRCON Bit Functions
Only TF0 and TF1 (timer 0 and timer 1 overflow flag) will be automatically cleared by hardware when the
service routine is called (Signals T0ACK and T1ACK – port ISR – active high when the service routine is
called).
External Interrupts
The 71M6521DE/DH/FE MPU allows seven external interrupts. These are connected as shown in Table 46. The
direction of interrupts 2 and 3 is programmable in the MPU. Interrupts 2 and 3 should be programmed for falling
sensitivity. The generic 8051 MPU literature states that interrupt 4 through 6 are defined as rising edge sensitive.
Thus, the hardware signals attached to interrupts 5 and 6 are inverted to achieve the edge polarity shown in Table
External
Interrupt
0
1
2
3
4
5
6
Connection
Digital I/O High Priority
Digital I/O Low Priority
FWCOL0, FWCOL1
CE_BUSY
PLL_OK (rising), PLL_OK (falling)
EEPROM busy
XFER_BUSY OR RTC_1SEC
Polarity
see DIO_Rx
see DIO_Rx
falling
falling
rising
falling
falling
Flag Reset
automatic
automatic
automatic
automatic
automatic
automatic
manual
Table 46: External MPU Interrupts
FWCOLx interrupts occur when the CE collides with a flash write attempt. See the flash write description for more
detail.
SFR (special function register) enable bits must be set to permit any of these interrupts to occur. Likewise, each
interrupt has its own flag bit, which is set by the interrupt hardware, and reset by the MPU interrupt handler. Note that
XFER_BUSY, RTC_1SEC, FWCOL0, FWCOL1, PLLRISE, PLLFALL, have their own enable and flag bits in addition
to the interrupt 6, 4, and 2 enable and flag bits.
IE0 through IEX6 are cleared automatically when the hardware vectors to the interrupt handler. The other flags,
IE_XFER through IE_PB , are cleared by writing a zero to them. Since these bits are in a bit-addressable SFR byte,
common practice would be to clear them with a bit operation. This is to be avoided. The hardware implements bit
operations as a byte wide read-modify-write hardware macro. If an interrupt occurs after the read, but before the
write, its flag will be cleared unintentionally. The proper way to clear the flag bits is to write a byte mask consisting of
all ones except for a zero in the location of the bit to be cleared. The flag bits are configured in hardware to ignore
ones written to them.
Rev 3
Page: 33 of 107
相关PDF资料 |
PDF描述 |
|---|---|
| 71M6531F-DB | BOARD DEMO 71M6531F |
| 71M6533-DB | BOARD DEMO 71M6533 |
| 71M6534H-DB | BOARD DEMO 71M6534H |
| 71M6541F-DB | DEMO BOARD 71M6541F |
| 71M6543F-DB-CT | DEMO BOARD 71M6543F-DB-CT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 71M6521FE-IGT | 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Residential Energy Meter IC |
| 71M6521FE-IGT/F | 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6521FE-IGT/F1 | 功能描述:计量片上系统 - SoC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
| 71M6521FE-IGTR | 制造商:Maxim Integrated Products 功能描述:Metering Systems on a Chip - SoC Residential Energy Meter IC |
| 71M6521FE-IGTR/F | 功能描述:计量片上系统 - SoC Residential Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 处理器系列:71M6511 类型:Metering SoC 最大时钟频率:70 Hz 程序存储器大小:64 KB 数据 RAM 大小:7 KB 接口类型:UART 可编程输入/输出端数量:12 片上 ADC: 安装风格:SMD/SMT 封装 / 箱体:LQFP-64 封装:Reel |
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