ADUC7121 Analog Devices, ADUC7121 Datasheet - Page 16

• Manufacturer Part Number: ADUC7121
• Description: Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU
• Manufacturer: Analog Devices

Specifications of ADUC7121

• Mcu Core: ARM7 TDMI
• Mcu Speed (mips): 40
• Sram (bytes): 8192Bytes
• Gpio Pins: 32
• Adc # Channels: 9

ADuC7121
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 9. Pin Function Descriptions
Pin No.
C12
D11
E11
C3
D3
E3
F3
G3
G10
Mnemonic
RST
P0.0/SCL0/PLAI[5]
P0.1/SDA0/PLAI[4]
P0.2/SPICLK/ADC
P0.3/MISO/PLAO[12]/SYNC
P0.4/MOSI/PLAI[11]/TRIP
P0.5/CS/PLAI[10]/ADC
P0.6/MRST/PLAI[2]
P0.7/TRST/PLAI[3]
BUSY
/PLAO[13]
CONVST
Type
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
G
M
A
B
C
D
E
H
K
F
J
L
1
1
1
Description
Reset Input (Active Low).
I
Programmable Logic Array for Input Element 5 (PLAI[5]).
I
Programmable Logic Array for Input Element 4 (PLAI[4]).
SPI Clock (SPICLK).
Status of the ADC (ADC
Programmable Logic Array for Output Element 13 (PLAO[13]).
SPI Master In Slave Out (MISO).
Programmable Logic Array for Output Element 12 (PLAO[12]).
Synchronous Reset (SYNC). Input to reset synchronously the PWM counters using an
external source.
General-Purpose Input and Output Port 0.4 (P0.4).
SPI Master Out Slave In (MOSI).
Programmable Logic Array for Input Element 11 (PLAI[11]).
PWM Trip Interrupt (TRIP). The TRIP function of Pin E3 is the input that allows the PWM
trip interrupt to be triggered.
SPI Slave Select Input (CS).
Programmable Logic Array for Input Element 10 (PLAI[10]).
ADC Conversions (ADC
conversions using the PLA or the timer output.
Power On Reset Output (MRST).
Programmable Logic Array for Input Element 2 (PLAI[2]).
JTAG Test Port Input, Test Reset (TRST). Debug and download access.
Programmable Logic Array for Input Element 3 (PLAI[3]).
2
General-Purpose Input and Output Port 0.0 (P0.0).
General-Purpose Input and Output Port 0.1 (P0.1).
General-Purpose Input and Output Port 0.2 (P0.2).
General-Purpose Input and Output Port 0.3 (P0.3).
General-Purpose Input and Output Port 0.5 (P0.5).
General-Purpose Input and Output Port 0.6 (P0.6).
General-Purpose Input and Output Port 0.7 (P0.7).
2
2
2
C Interface Serial Clock for I
C Interface Serial Data for I
3
3
Figure 7. Pin Configuration
4
4
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5
ADuC7121
5
TOP VIEW
6
6
7
7
8
8
9 10 11 12
9 10 11 12
CONVST
BUSY
).
). The ADC
2
2
C0 (SDA0).
C0 (SCL0).
A
B
C
D
E
F
G
H
J
K
L
M
CONVST
function of Pin F3 initiates the ADC