13892 datasheet(42/156 Pages) FREESCALE

42 / 156 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

13892

FUNCTIONAL DEVICE OPERATION

PROGRAMMABILITY

The SPI interface is comprised of the package pins listed in Table 9.

Table 9. SPI Interface Pin Description

CLK

Clock input line, data shifting occurs at the rising edge

MOSI

Serial data input line

MISO

Serial data output line

Clock enable line, active high

INT

Interrupt to processor

SPIVCC

Processor SPI bus supply

SPI INTERFACE DESCRIPTION

The control bits are organized into 64 fields. Each of these 64 fields contains 32 bits. A maximum of 24 data bits are used per

field. In addition, there is one “dead” bit between the data and address fields. The remaining bits include 6 address bits to address

the 64 data fields and one write enable bit to select whether the SPI transaction is a read or a write.

The register set will be to a large extent compatible with the MC13783 in order to facilitate software development.

For each SPI transfer, first a one is written to the read/write bit if this SPI transfer is to be a write. A zero is written to the read/

write bit if this is to be a read command only.

The CS line must remain high during the entire SPI transfer. To start a new SPI transfer, the CS line must go inactive and then

go active again. The MISO line will be tri-stated while CS is low.

To read a field of data, the MISO pin will output the data field pointed to by the 6 address bits loaded at the beginning of the

SPI sequence.

Figure 5. SPI Transfer Protocol Single Read/Write Access

Unused

Switchers 4

ADC 1

Test 1

Power Control 0

Switchers 5

ADC 2

Test 2

Power Control 1

Regulator Setting 0

ADC 3

Test 3

Power Control 2

Regulator Setting 1

ADC4

Test 4

SPI Bus

Description

Interrupt

Description

Supply

Description

Table 8. Register Set

13892 датащи(PDF) 42 Page - Freescale Semiconductor, Inc

13892 датащи(HTML) 42 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL