UPSD3433E-40U6 STMicroelectronics, UPSD3433E-40U6 Datasheet - Page 212

• Manufacturer Part Number: UPSD3433E-40U6
• Description: MCU 8BIT 8032 128KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3433E-40U6

• 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 READER497-5218 - KIT DEVELOPMENT FOR UPSD3400497-2381 - CABLE PROGRAMMER FLASH LINK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-4907

PSD module
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Erase time-out flag (DQ3)
The Erase Time-out Flag Bit (DQ3) reflects the time-out period allowed between two
consecutive sector erase instruction sequence bytes. If multiple sector erase commands are
desired, the additional sector erase commands (30h) must be sent by the 8032 within 80us
after the previous sector erase command. DQ3 is 0 before this time period has expired,
indicating it is OK to issue additional sector erase commands. DQ3 will go to logic ’1’ if the
time has been longer than 80µs since the previous sector erase command (time has
expired), indication that is not OK to send another sector erase command. In this case, the
8032 must start a new sector erase instruction sequence (unlock and command) beginning
again after the current sector erase operation has completed.
Programming Flash memory
When a byte of Flash memory is programmed, individual bits are programmed to logic '0.'
cannot program a bit in Flash memory to a logic ’1’ once it has been programmed to a logic
'0.' A bit must be erased to logic ’1’, and programmed to logic '0.' That means Flash memory
must be erased prior to being programmed. A byte of Flash memory is erased to all 1s
(FFh). The 8032 may erase the entire Flash memory array all at once, or erase individual
sector-by-sector, but not erase byte-by-byte. However, even though the Flash memories
cannot be erased byte-by-byte, the 8032 may program Flash memory byte-by-byte. This
means the 8032 does not need to program group of bytes (64, 128, etc.) at one time, like
some Flash memories.
Each Flash memory requires the 8032 to send an instruction sequence to program a byte or
to erase sectors (see
If the byte to be programmed is in a protected Flash memory sector, the instruction
sequence is ignored.
Important note: It is mandatory that a chip-select signal is active for the Flash sector where
a programming instruction sequence is targeted. The user must make sure that the correct
chip-select equation, FSx or CSBOOTx specified in PSDsoft Express matches the address
range that the 8032 firmware is accessing, otherwise the instruction sequence will not be
recognized by the Flash array. If memory paging is used, be sure that the 8032 firmware
sets the page register to the correct page number before issuing an instruction sequence to
the Flash memory segment on a particular memory page, otherwise the correct sector
select signal will not become active.
Once the 8032 issues a Flash memory program or erase instruction sequence, it must
check the status bits for completion. The embedded algorithms that are invoked inside a
Flash memory array provide several ways to give status to the 8032. Status may be checked
using any of three methods: Data Polling, Data Toggle, or Ready/Busy (pin PC3).
Table 164. Flash memory status bit definition
1. X = Not guaranteed value, can be read either '1' or '0.'
2. DQ7-DQ0 represent the 8032 data bus bits, D7-D0.
Functional
memory
block
Flash
segment is selected)
FSx, or CSBOOTx
Active (the desired
Table 163 on page
polling
Data
DQ7
209).
Toggle
UPSD3422, UPSD3433, UPSD3434, UPSD3454
DQ6
flag
(1) (2)
Error
DQ5
flag
DQ4
X
timeout
Erase
DQ3
DQ2
X
DQ1
X
DQ0
X