Datasheet

ADuCM360/ADuCM361 Data Sheet
Rev. B | Page 18 of 24
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
1
2
3
P0.7/POR/SOUT
P0.6/IRQ2/SIN
P0.5/CTS/IRQ1
4
P0.4/RTS/ECLKO
5
P0.3/IRQ0/CS1
6
P0.2/MOSI1/SDA/SOUT
7
P0.1/SCLK1/SCL/SIN
24AIN7/VBIAS0/IEXC/EXTREF2IN+
23AIN6/IEXC
22AIN5/IEXC
21IREF
20INT_REF
19DAC
18AVDD_REG
17AVDD
16AGND
15VREF–
14VREF+
13GND_SW
44
P1.6/IRQ6/PWM4/MOSI0
45
P1.7/IRQ7/PWM5/CS0
46
P2.0/SCL/UARTCLK
47
SWCLK
48
SWDIO
43
P1.5/IRQ5/PWM3/SCLK0
42
P1.4/PWM2/MISO0
41
P1.3/PWM1/DSR
40
P1.2/PWM0/RI
39
P1.1/IRQ4/PWMTRIP/DTR
38
P1.0/IRQ3/PWMSYNC/EXTCLK
37
IOVDD
T
OP
VIEW
(Not to Scale)
ADuCM360/
ADuCM361
25
AIN4/IEXC
26
AIN3
27
AIN2
28
AIN1
29
AIN0
30
DVDD_REG
31
IOVDD
32
X
TALI
33
XTALO
34
P2.2/BM
35
P2.1/SDA/UARTDCD
NOTES
1. THE LFCS
P HAS AN EXPOSED PAD THA
T MUST BE SOLDERED T
O A
METAL PLATE
ON THE PCB FOR MECHANICAL
REASONS AND TO DGND.
36
RESET
8
P0.0/MISO1
9
AIN11/VBIAS1
10
AIN10
11
AIN9/DACBUFF+
12
AIN8/EXTREF2IN–
09743-007
Figure 8. Pin Configuration
Table 16. Pin Function Descriptions
Pin No. Mnemonic Description
1
RESET
Reset Pin, Active Low Input. An internal pull-up is provided.
2 P2.1/SDA/UARTDCD General-Purpose Input/Output P2.1/I
2
C Serial Data Pin/UART Data Carrier Detect Pin.
3 P2.2/BM
General-Purpose Input/Output P2.2/Boot Mode Input Select Pin. When this pin is held low
during and for a short time after any reset sequence, the part enters UART download mode.
4 XTALO External Crystal Oscillator Output Pin. Optional 32.768 kHz source for real-time clock.
5 XTALI External Crystal Oscillator Input Pin. Optional 32.768 kHz source for real-time clock.
6 IOVDD Digital System Supply Pin. This pin must be connected to DGND via a 0.1 µF capacitor.
7 DVDD_REG This pin must be connected to DGND via a 470 nF capacitor and to Pin 18, AVDD_REG.
8 AIN0
ADC Analog Input 0. This pin can be configured as a positive or negative input to either ADC
in differential or single-ended mode.
9 AIN1
ADC Analog Input 1. This pin can be configured as a positive or negative input to either ADC
in differential or single-ended mode.
10 AIN2
ADC Analog Input 2. This pin can be configured as a positive or negative input to either ADC
in differential or single-ended mode.
11 AIN3
ADC Analog Input 3. This pin can be configured as a positive or negative input to either ADC
in differential or single-ended mode.
12 AIN4/IEXC
ADC Analog Input 4/Excitation Current Source. This pin can be configured as a positive or
negative input to either ADC in differential or single-ended mode (AIN4). This pin can also be
configured as the output pin for Excitation Current Source 0 or Excitation Current Source 1 (IEXC).
13 GND_SW Sensor Power Switch to Analog Ground Reference.