UPSD3234A-40U6T STMicroelectronics, UPSD3234A-40U6T Datasheet - Page 51

• Manufacturer Part Number: UPSD3234A-40U6T
• Description: IC MCU 8032 64KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3234A-40U6T

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, UART/USART, USB
• Peripherals: LVR, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 288KB (288K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

UPSD3234A, UPSD3234BV, UPSD3233B, UPSD3233BV
7
I/O ports (MCU module)
The MCU module has five ports: Port 0, Port 1, Port 2, Port 3, and Port 4. (Refer to the PSD
module section on I/O ports A,B,C and D). Ports P0 and P2 are dedicated for the external
address and data bus and is not available in the 52-pin package devices.
Port 1- Port 3 are the same as in the standard 8032 microcontrollers, with the exception of
the additional special peripheral functions. All ports are bi-directional. Pins of which the
alternative function is not used may be used as normal bi-directional I/O.
The use of Port 1-Port 4 pins as alternative functions are carried out automatically by the
UPSD323xx devices provided the associated SFR Bit is set HIGH.
The following SFR registers
mapping of alternate functions onto the I/O port bits. Port 1 alternate functions are
controlled using the P1SFS register, except for Timer 2 and the 2nd UART which are
enabled by their configuration registers. P1.0 to P1.3 are default to GPIO after reset.
Port 3 pins 6 and 7 have been modified from the standard 8032. These pins that were used
for READ and WRITE control signals are now GPIO or I
pins are assigned to dedicated pins.
Port 3 (I
Special Function Selection registers. After a reset, the I/O pins default to GPIO. The
alternate function is enabled if the corresponding bit in the PXSFS register is set to '1.' Other
Port 3 alternative functions (UART, Interrupt, and Timer/Counter) are enabled by their
configuration register and do not require setting of the bits in P3SFS.
Table 28.
Table 29.
0=Port 1.7
1=ACH3
7
2
C) and Port 4 alternate functions are controlled using the P3SFS and P4SFS
Port name
USB +/-
Port 1
Port 3
Port 4
0=Port 1.6
I/O port functions
P1SFS (91h)
1=ACH2
6
0=Port 1.5
1=ACH1
5
(Table
29,
0=Port 1.4
1=ACH0
Table
Main function
4
USB +/- Only
GPIO
GPIO
GPIO
30, and
Bits are reserved
3
Table
2
C bus pins. The READ and WRITE
31) are used to control the
2
I/O ports (MCU module)
2nd UART - Bits 2,3
Interrupt - Bits 2,3
Timer 2 - Bits 0,1
Timers - Bits 4,5
UART - Bits 0,1
PWM - Bits 3..7
ADC - Bits 4..7
DDC - Bits 0..2
I
2
Alternate
C - Bits 6,7
Bits are reserved
1
0
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