aduc847bs8-3 Analog Devices, Inc., aduc847bs8-3 Datasheet - Page 10

• Manufacturer Part Number: aduc847bs8-3
• Description: Microconverter, 10-channel 24-bit Adc With Embedded 62kb Flash Mcu
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
*Note: This pin is provided on the CSP version only.
REV. PrA 05/03
52-MQFP
20, 34, 48
21, 35, 47
Pin No:
16-19
22-25
----
----
12
13
14
15
16
17
18
19
22
23
24
25
26
27
23, 37, 38,
22, 36, 51
Pin No:
56-CSP
18-21
24-27
12
13
14
15
16
17
18
19
20
21
24
25
26
27
50
28
29
P1.7/AIN7/IEXC2
P3.0
SCLK (I2C)
Mnemonic
P3.2/INT0
P3.3/INT1
P3.0/RXD
P3.1/TXD
AINCOM
P3.6//WR
P3.7//RD
SDATA
P3.4/T0
P3.5/T1
RESET
DVDD
DGND
AIN8
AIN9
Pin
----
P3.7
Type*
I/O
----
I/O
I/O
I/O
S
S
I
I
I
I
Description
By power on default P1.7/AIN7 is configured as the AIN7 Analog Input. AIN7
can be used as a pseudo differential input when used with AINCOM or as the
negative input of a fully differential pair when used with AIN6.
One or Both current sources can also be configured at this pin
P1.1 has no digital output driver. It can function as a digital input for which ‘0’
must be written to the port bit. As a digital input, this pin must be driven high
or low externally.
All analog inputs can be referred to this pin provided a relevant pseudo
differential input mode is selected.
AIN8 can be used as a pseudo differential analog input when used with
AINCOM or as the positive input of a fully differential pair when used with
AIN9*.
AIN9 can be used as a pseudo differential analog input when used with
AINCOM or as the negative input of a fully differential pair when used with
AIN8*.
Reset Input. A high level on this pin for 16 core clock cycles while the
oscillator is running resets the device. There is an internal weak pull-down and
a Schmitt trigger input stage on this pin.
P3.0–P3.7 are bi-directional port pins with internal pull-up resistors. Port 3 pins
that have 1s written to them are pulled high by the internal pull-up resistors,
and in that state can be used as inputs. As inputs, Port 3 pins being pulled
externally low will source current because of the internal pull-up resistors.
When driving a 0-to-1 output transition, a strong pull-up is active for two core
clock periods of the instruction cycle.
Port 3 pins also have various secondary functions described below.
Receiver Data for UART serial Port
Transmitter Data for UART serial Port
External Interrupt 0. This pin can also be used as a gate control input to
Timer0.
External Interrupt 1. This pin can also be used as a gate control input to
Timer1.
Timer/Counter 0 External Input
Timer/Counter 1 External Input
External Data Memory Write Strobe. Latches the data byte from Port 0 into an
external data memory.
External Data Memory Read Strobe. Enables the data from an external data
memory to Port 0.
Digital Supply Voltage
Digital Ground.
Serial interface clock for the I2C interface. As an input this pin is a Schmitt
triggered input and a weak internal pull-up is present on this pin unless it is
outputting logic low. this pin can also be controlled in software as a digital
output pin.
Serial data pin for the I
pull-up present unless it is outputting logic low.
10
2
C interface. As an input this pin has a weak internal
ADuC847