UPSD3433EB40U6 STMicroelectronics, UPSD3433EB40U6 Datasheet - Page 79

• Manufacturer Part Number: UPSD3433EB40U6
• Description: MCU 8BIT 8032 128KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3433EB40U6

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IrDA, SPI, UART/USART, USB
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 160KB (160K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• For Use With: 497-5518 - EVAL BOARD RFID READER497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-5660

uPSD34xx
18.4
A[10:8] and the remaining pins can be configured for other functions such as generating
chip selects to the external devices.
Figure 20. Connecting external devices using ports A and B for address AD[15:0]
Figure 21. Connecting external devices using port A and an external latch for
Programmable bus timing
The length of the bus cycles are user programmable at run time. The number of MCU_CLK
periods in a bus cycle can be specified in the SFR register named BUSCON (see
on page
MCU_CLK periods) after a reset condition. It is important that the post-reset initialization
firmware sets the bus cycle times appropriately to get the most performance, according to
Table 38 on page
and a slower but less power consuming Non-Turbo Mode. The bus cycle times must be
programmed in BUSCON to optimize for each mode as shown in
Section 28.5: PSD module detailed operation on page 201
81). By default, the BUSCON Register is loaded with long bus cycle times (6
AI10434
AI10435
address AD[15:0]
Module
Module
MCU
MCU
82. Keep in mind that the PSD Module has a faster Turbo Mode (default)
AD[15:8]
PSEN
ALE
RD or WR
AD[7:0]
AD[15:8]
PSEN
ALE
RD or WR
AD[7:0]
uPSD34xx
uPSD34xx
L
A
T
C
H
RD or WR
D[7:0]
RD or WR
D[7:0]
A7-0
Module
Module
PSD
PSD
Port B
Port A
Port B
for more details.
A8-15
A0-7
A8-15
Table
CS
CS
38. See
MCU bus interface
External
Device
External
Device
8-bit
8-bit
Table 37
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