Datasheet

ADC1010S_SER All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved.
Product data sheet Rev. 2 — 28 December 2010 26 of 39
NXP Semiconductors
ADC1010S series
Single 10-bit ADC; CMOS or LVDS DDR digital outputs
11.5.7 Output codes versus input voltage
11.6 Serial peripheral interface
11.6.1 Register description
The ADC1010S serial interface is a synchronous serial communications port that allows
easy interfacing with many commonly-used microprocessors. It provides access to the
registers that control the operation of the chip.
This interface is configured as a 3-wire type (SDIO as bidirectional pin)
Pin SCLK is the serial clock input and CS
is the chip select pin.
Each read/write operation is initiated by a LOW level on pin CS
. A minimum of three bytes
is transmitted (two instruction bytes and at least one data byte). The number of data bytes
is determined by the value of bits W1 and W2 (see Table 18
).
[1] Bit R/W indicates whether it is a read (logic 1) or a write (logic 0) operation.
[2] Bits W1 and W0 indicate the number of bytes to be transferred after the instruction byte (see Table 18
).
Table 16. Output codes
V
INP
− V
INM
Offset binary Two’s complement OTR pin
< −1 00 0000 0000 10 0000 0000 1
−1.0000000 00 0000 0000 10 0000 0000 0
−0.9980469 00 0000 0001 10 0000 0001 0
−0.9960938 00 0000 0010 10 0000 0010 0
−0.9941406 00 0000 0011 10 0000 0011 0
−0.9921875 00 0000 0100 10 0000 0100 0
.... .... .... 0
−0.0039063 01 1111 1110 11 1111 1110 0
−0.0019531 01 111 1111 11 1111 1111 0
0.0000000 10 0000 0000 00 0000 0000 0
+0.0019531 10 0000 0001 00 0000 0001 0
+0.0039063 10 0000 0010 00 0000 0010 0
.... .... .... 0
+0.9921875 11 1111 1011 01 1111 1011 0
+0.9941406 11 1111 1100 01 1111 1100 0
+0.9960938 11 1111 1101 01 1111 1101 0
+0.9980469 11 1111 1110 01 1111 1110 0
+1.0000000 11 1111 1111 01 1111 1111 0
> [phone] 1111 1111 1
Table 17. Instruction bytes for the SPI
MSB LSB
Bit 76543210
Description R/W
[1]
W1
[2]
W0
[2]
A12 A11 A10 A9 A8
A7 A6 A5 A4 A3 A2 A1 A0