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71M6534H Datasheet(PDF) 50 Page - Teridian Semiconductor Corporation |
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71M6534H Datasheet(HTML) 50 Page - Teridian Semiconductor Corporation |
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50 / 124 page  71M6533/71M6534 Data Sheet FDS_6533_6534_004 50 © 2007-2009 TERIDIAN Semiconductor Corporation v1.1 A15 A14 A1 A0 C0 0 31 x D7 D6 D1 D0 D7 D6 D1 D0 C5 C6 C7 x PCSZ PSCK PSDI PSDO 8 bit CMD 16 bit Address DATA[ADDR] DATA[ADDR+1] 7 8 23 24 32 39 Extended Read . . . SERIAL READ A15 A14 A1 A0 C0 0 31 C5 C6 C7 x PCSZ PSCK PSDI PSDO 8 bit CMD 16 bit Address DATA[ADDR] DATA[ADDR+1] 7 8 23 24 32 39 Extended Write . . . SERIAL WRITE D7 D6 D1 D0 D7 D6 D1 D0 x HI Z HI Z (From Host) (From 653X) (From Host) (From 653X) Figure 15: SPI Slave Port: Typical Read and Write operations Table 43: SPI Command Description Command Description 11xx xxxx ADDR Byte0 ... ByteN Read data starting at ADDR. The ADDR will auto-increment until PCSZ is raised. Upon completion: SP__CMD=11xx xxxx, SP_ADDR=ADDR+N+1. No MPU interrupt is generated if the command is 1100 0000. Other- wise, an SPI interrupt is generated. 10xx xxxx ADDR Byte0 ... ByteN Write data starting at ADDR. The ADDR will auto-increment until PCSZ is raised. Upon completion: SP_CMD=10xx xxxx, SP_ADDR=ADDR+N+1. No MPU interrupt is generated if the command is 1000 0000. Other- wise, an SPI interrupt is generated. 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 71M6533 or 71M6534 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 loca- tions, the external host can initiate and control processes in the 71M6533/71M6534 MPU. Writ- ing 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 71M6533 or 71M6534 as an analog front-end (AFE). |
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