UPSD3234A-40U6T STMicroelectronics, UPSD3234A-40U6T Datasheet - Page 135

• 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
24.2
Figure 61. General I/O port architecture
The Port pin’s tri-state output driver enable is controlled by a two input OR gate whose
inputs come from the CPLD AND Array enable product term and the Direction Register. If
the enable product term of any of the Array outputs are not defined and that port pin is not
defined as a CPLD output in the PSDsoft, then the Direction Register has sole control of the
buffer that drives the port pin.
The contents of these registers can be altered by the MCU. The Port Data Buffer (PDB)
feedback path allows the MCU to check the contents of the registers.
Ports A, B, and C have embedded Input Macrocells (IMC). The Input Macrocells (IMC) can
be configured as latches, registers, or direct inputs to the PLDs. The latches and registers
are clocked by Address Strobe (ALE) or a product term from the PLD AND Array. The
outputs from the Input Macrocells (IMC) drive the PLD input bus and can be read by the
MCU. See
Port operating modes
The I/O Ports have several modes of operation. Some modes can be defined using PSDsoft,
some by the MCU writing to the Control Registers in CSIOP space, and some by both. The
modes that can only be defined using PSDsoft must be programmed into the device and
cannot be changed unless the device is reprogrammed. The modes that can be changed by
the MCU can be done so dynamically at run-time. The PLD I/O, Data Port, Address Input,
and Peripheral I/O modes are the only modes that must be defined before programming the
device. All other modes can be changed by the MCU at run-time. See Application Note
AN1171 for more detail.
Table 93
where the different modes are configured. Each of the port operating modes are described
in the following sections.
summarizes which modes are available on each port.
Figure
ADDRESS
ALE
MACROCELL OUTPUTS
EXT CS
WR
ENABLE PRODUCT TERM ( .OE )
WR
WR
60.
CONTROL REG.
CPLD-INPUT
DATA OUT
READ MUX
DIR REG.
D
D
G
D
D
REG.
P
D
B
Q
Q
Q
Q
DATA IN
DATA OUT
ADDRESS
OUTPUT
SELECT
OUTPUT
MUX
ENABLE OUT
Table 96
MACROCELL
I/O ports (PSD module)
INPUT
shows how and
PORT PIN
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