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參數資料
| 型號： | 71M6541D-IGT/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP64 |
| 封裝： | LEAD FREE, LQFP-64 |
| 文件頁數： | 137/165頁 |
| 文件大?。?/td> | 2208K |
| 代理商： | 71M6541D-IGT/F |
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v1.1
2008–2011 Teridian Semiconductor Corporation
73
Figure 25: 3-Wire Interface. Write Command when CNT=0
Figure 26: 3-wire Interface. Write Command when HiZ=1 and WFR=1.
2.5.10 SPI Slave Port
The slave SPI port communicates directly with the MPU data bus and is able to read and write Data RAM
and I/O RAM locations. It is also able to send commands to the MPU. The interface to the slave port
consists of the SPI_CSZ, SPI_CKI, SPI_DI and SPI_DO pins. These pins are multiplexed with the
combined DIO/LCD segment driver pins SEGDIO36 to SEGDIO39.
Additionally, the SPI interface allows flash memory to be read and to be programmed. To facilitate flash
programming, cycling power or asserting RESET causes the SPI port pins to default to SPI mode. The
SPI port is disabled by clearing the SPI_E bit (I/O RAM 0x270C[4]).
Possible applications for the SPI interface are:
1) An external host reads data from CE locations to obtain metering information. This can be used in
applications where the 71M654x function as a smart front-end with preprocessing capability. Since
the addresses are in 16-bit format, any type of XRAM data can be accessed: CE, MPU, I/O RAM, but
not SFRs or the 80515-internal register bank.
2) A communication link can be established via the SPI interface: By writing into MPU memory locations,
the external host can initiate and control processes in the 71M654x MPU. Writing to a CE or MPU
location normally generates an interrupt, a function that can be used to signal to the MPU that the
byte that had just been written by the external host must be read and processed. Data can also be
inserted by the external host without generating an interrupt.
3) An external DSP can access front-end data generated by the ADC. This mode of operation uses the
71M654x as an analog front-end (AFE).
4) Flash programming by the external host (SPI Flash Mode).
SPI Transactions
A typical SPI transaction is as follows. While SPI_CSZ is high, the port is held in an initialized/reset state.
During this state, SPI_DO is held in Hi-Z state and all transitions on SPI_CLK and SPI_DI are ignored.
When SPI_CSZ falls, the port begins the transaction on the first rising edge of SPI_CLK. As shown in
Table 62, a transaction consists of an optional 16 bit address, an 8 bit command, an 8 bit status byte,
followed by one or more bytes of data. The transaction ends when SPI_CSZ is raised. Some transactions
may consist of a command only.
CNT Cycles (0 shown)
Write -- No HiZ
D7
INT5 not issued
CNT Cycles (0 shown)
Write -- HiZ
INT5 not issued
EECTRL Byte Written
SCLK (output)
BUSY (bit)
SDATA (output)
SCLK (output)
BUSY (bit)
SDATA (output)
(HiZ)
SDATA output Z
(LoZ)
CNT Cycles (6 shown)
Write -- With HiZ and WFR
EECTRL Byte Written
SCLK (output)
BUSY
(bit)
SDATA (out/in)
D2
D3
D4
D5
D6
D7
BUSY
READY
(From EEPROM)
INT5
(From 654x)
SDATA output Z
(HiZ)
(LoZ)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 71M6541D-IGTR/F | 功能描述:計量片上系統 - SoC Precision Energy Meter IC RoHS:否 制造商:Maxim Integrated 核心:80515 MPU 處理器系列:71M6511 類型:Metering SoC 最大時鐘頻率:70 Hz 程序存儲器大小:64 KB 數據 RAM 大小:7 KB 接口類型:UART 可編程輸入/輸出端數量:12 片上 ADC: 安裝風格:SMD/SMT 封裝 / 箱體:LQFP-64 封裝:Reel |
| 71M6541DT-IGT/F | 制造商:Maxim Integrated Products 功能描述:ENERGY METER ICS - Rail/Tube |
| 71M6541DT-IGTR/F | 制造商:Maxim Integrated Products 功能描述:1-PHASE SOC, 32KB FLASH, PRES TEMP SENSOR - Tape and Reel |
| 71M6541F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:71M6541D/71M6541F/71M6541G/71M6542F/71M6542G 是 TeridianTM 的第4 代高集成度單相電表SoC |
| 71M6541F-DB | 功能描述:開發板和工具包 - 8051 71M6541 Eval Kit RoHS:否 制造商:Silicon Labs 產品:Development Kits 工具用于評估:C8051F960, Si7005 核心: 接口類型:USB 工作電源電壓: |
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