ST52T440F3M6 STMicroelectronics, ST52T440F3M6 Datasheet - Page 33

• Manufacturer Part Number: ST52T440F3M6
• Description: MCU 8-Bit ST52 CISC 8KB EPROM 5V 20-Pin SO
• Manufacturer: STMicroelectronics

Specifications of ST52T440F3M6

• Package: 20SO
• Family Name: ST52
• Maximum Speed: 20 MHz
• Ram Size: 256 Byte
• Program Memory Size: 8 KB
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Program Memory Type: EPROM
• Number Of Programmable I/os: 13
• On-chip Adc: 6-chx12-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 1

3 EPROM PROGRAMMING
EPROM memory provides an on-chip user-pro-
grammable non-volatile memory, which allows fast
and reliable storage of user data.
EPROM memory can be locked by the user. In
fact, a memory location, called Lock Cell, is
devoted to lock the EPROM and to prevent
Table 3.1 EPROM Control Register
Figure 3.1 Program Memory Organization
Lock Status Reading
Memory Lock Status
Memory Unlock and
Reading / Verify
Reading / Verify
Reading / Verify
OPERATION
ID CODE
ID CODE
Stand By
Memory
Memory
Memory
Writing
Writing
Lock
REGISTER VALUE
2000h
0015h
0400h
0003h
0000h
10
0
1
2
3
4
5
9
PROGRAM INSTRUCTIONS
PROGRAM INSTRUCTIONS
MEMBERSHIP FUNCTIONS
AND PERMANENT DATA
AND PERMANENT DATA
INTERRUPT VECTORS
RESET VECTOR
PARAMETERS
memory reading. A software identification code
(max 64 bytes), called ID CODE may also be writ-
ten in order to distinguish which software version
is stored in the memory.
There are 64 kbits of memory space with an 8-bit
internal parallelism (8 kbytes) addressed by a 13-
bit bus. The data bus is of 8 bits.
Memory has a double supply: V
12V 5% in Programming Phase or to V
Working Phase. V
The ST52x400/440/441 EPROM memory is
divided into three main blocks (see Figure 3.1):
•
• Mbfs Setting memory block (15 through 1024)
• The Program Instruction Set memory block
Interrupt Vectors memory block (3 through 14)
contains the addresses for the interrupt rou-
tines. Each address is composed of three
bytes.
contains the coordinates of the vertexes of
every Mbf defined in the program. If this part of
the memory is not used to store the Mbfs set-
ting, it can be use to store the instruction set on
the user program.
(1024 through 8191) contains the instruction
set of the user program.
DD
ST52T400/T440/E440/T441
is equal to 5V 10%.
PP
is equal to
SS
during
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