
140721
PRODUCT
MANUAL
PCM-MIO-G-1 13
Notes: (1) Accessed when REGISTER SELECT (BASE +3 bit 4 & 3) = 00
(2) Accessed when REGISTER SELECT (BASE +3 bit 4 & 3) = 01
(3) 0=Disabled, 1=Enable
7
6
5
4
3
2
1
0
DATA_LO
0
R
LOW ORDER DATA BYTE
DATA-BIT 7
DATA-BIT 6
DATA-BIT 5
DATA-BIT 4
DATA-BIT 3
DATA-BIT 2
DATA-BIT 1
DATA-BIT 0
DATA_HI
1
R
HIGH ORDER DATA BYTE
DATA-BIT 15
DATA-BIT 14
DATA-BIT 13
DATA-BIT 12
DATA-BIT 11
DATA-BIT 10
DATA-BIT 9
DATA-BIT 8
COMMAND
(1)
2
R/W
COMMAND
CMD-BIT 7
CMD-BIT 6
CMD-BIT 5
CMD-BIT 4
CMD-BIT 3
CMD-BIT 2
CMD-BIT 1
CMD-BIT 0
RESOURCE
(2)
2
R/W
DMA CHANNEL ASSIGNMENT
INTERRUPT ROUTING ASSIGNMENT
IRQ[15-3] 0, 1, 2, 8 AND 13 NOT AVAILABLE
DATA
REGISTER
BIT 1
DATA
REGISTER
BIT 0
DATA
REGISTER
BIT 1
DATA
REGISTER
BIT 0
BIT 3
BIT 2
BIT 1
BIT 0
RESOURCE
ENABLE
3
W
X
X
X
REGISTER SELECT
DATA DRQ
ENABLE (3)
CMD DRQ
ENABLE (3)
INTERRUPT
ENABLE (3)
BIT 1
BIT 0
STATUS
3
R
DATA READY
DATA DMA
REQUEST
PENDING (3)
CMD DMA
REQUEST
PENDING (3)
INTERRUPT
REQUEST
PENDING (3)
REGISTER
SELECT
STATUS
DATA DRQ
ENABLE
STATUS (3)
CMD DRQ
ENABLE
STATUS (3)
INTERRUPT
EANBLE BIT
STATUS (3)
Address (Base+)
Read/Write
Register
A/D Converters
The PCM-MIO uses two Linear Tech LTC-1859CG 8-channel A/D converters. Each device is independently software
configurable to support the listed input modes and ranges. The devices use a full-duplex serial interface which
transmits and receives data simultaneously. An 8-bit command is shifted into the ADC interface to configure it for the
next conversion. At the same time, the data from the previous conversion is shifted out of device. Consequently, the
conversion result is delayed by one conversion from the command word.
A/D1 - Starting at BASE +0
The COMMAND register, RESOURCE register and RESOURCE ENABLE registers are used to configure the A/D device
operation. The specific options of each register are detailed here.
SOFTWARE SUMMARY
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