MAX1243BCSA Maxim Integrated Products, MAX1243BCSA Datasheet - Page 30

• Manufacturer Part Number: MAX1243BCSA
• Description: ADC (A/D Converters) Integrated Circuits (ICs)
• Manufacturer: Maxim Integrated Products

Specifications of MAX1243BCSA

• Number Of Adc Inputs: 1
• Architecture: SAR
• Conversion Rate: 73 KSPs
• Resolution: 10 bit
• Input Type: Voltage
• Interface Type: 3-Wire (SPI, QSPI, Microwire)
• Voltage Reference: External
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 2.7 V
• Maximum Power Dissipation: 471 mW
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: SO-8
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: No

12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
Write a command byte to the GPIO command register
to configure, write, or read the GPIOs, as detailed in
Table 12.
Write the command byte 00000011 to configure the
GPIOs. The eight SCLK cycles following the command
byte load data from DIN to the GPIO configuration reg-
ister in the MAX1221/MAX1343. See Tables 13 and 14.
The register bits are updated after the last CS rising
edge. All GPIOs default to inputs upon power-up.
The data in the register controls the function of each
GPIO, as shown in Tables 13, 14, and 16.
Write the command byte 00000010 to indicate a GPIO
write operation. The eight SCLK cycles following the com-
mand byte load data from DIN into the GPIO write register
in the MAX1221/MAX1343. See Tables 14 and 15. The
register bits are updated after the last CS rising edge.
Table 13. MAX1221/MAX1343 GPIO Configuration
Table 14. MAX1221/MAX1343 GPIO Write
Table 15. GPIO-Mode Control
Table 16. MAX1221/MAX1343 GPIO Read
30
DIN
DOUT
DIN
DOUT
DIN
DOUT
DATA PIN
CONFIGURATION
DATA PIN
DATA PIN
______________________________________________________________________________________
BIT
1
1
0
0
0
0
0
0
0
0
0
0
GPIO COMMAND BYTE
0
0
0
0
0
0
GPIO COMMAND BYTE
GPIO COMMAND BYTE
WRITE
BIT
0
0
1
0
1
0
0
0
0
0
0
0
0
0
0
0
OUTPUT
Tri-state
STATE
0
0
0
0
0
0
1
0
0
0
0
0
0
GPIO Command
0
0
1
0
1
0
GPIO Write
1
0
(open drain)
FUNCTION
Pulldown
Output
Output
X
0
1
0
GPIO
Input
0
0
X
0
GPIOC1
GPIOC1
0
0
X
0
Write the command byte 00000001 to indicate a GPIO
read operation. The eight SCLK cycles following the
command byte transfer the state of the GPIOs to DOUT
in the MAX1221/MAX1343. See Table 16.
Write a command byte 0001XXXX to the DAC select
register to indicate the word to follow is written to the
DAC serial interface, as detailed in Tables 1, 10, 17, and
18. Write the next 16 bits to the DAC interface register,
as shown in Tables 17 and 18. Following the high-to-low
transition of CS, the data is shifted synchronously and
latched into the input register on each falling edge of
SCLK. Each word is 16 bits. The first 4 bits are the con-
trol bits followed by 12 data bits (MSB first). See Figures
9–12 for DAC timing specifications.
If CS goes high prior to completing 16 SCLK cycles, the
command is discarded. To initiate a new transfer, drive
CS low again.
For example, writing the DAC serial interface word 1111
0000 and 0011 0100 disconnects DAC outputs 2 and 3
X
0
GPIOC0
GPIOC0
0
0
GPIOC1
X
DATA BYTE
GPIOA1
GPIOA1
DATA BYTE
DATA BYTE
0
0
GPIOC0
X
GPIOA0
GPIOA0
0
0
GPIOA1
DAC Serial Interface
X
X
0
X
0
X
0
X
0
GPIO Read
GPIOA0
X
0
X
0
X
X
0
0
X