UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 103

• Manufacturer Part Number: UPSD3254
• Description: Flash Programmable System Devices with 8032 Microcontroller Core
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

In-System Programming (ISP)
Using the JTAG signals on Port C, the entire PSD
MODULE device can be programmed or erased
without the use of the MCU. The primary Flash
memory can also be programmed in-system by
the MCU executing the programming algorithms
out of the secondary memory, or SRAM. The sec-
ondary memory can be programmed the same
Table 83. Methods of Programming Different Functional Blocks of the PSD MODULE
Primary Flash Memory
Secondary Flash Memory
PLD Array (DPLD and CPLD)
PSD MODULE Configuration
Functional Block
UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Yes
Yes
Yes
Yes
JTAG Programming
way by executing out of the primary Flash memo-
ry. The PLD or other PSD MODULE Configuration
blocks can be programmed through the JTAG port
or a device programmer. Table 83 indicates which
programming methods can program different func-
tional blocks of the PSD MODULE.
Yes
Yes
Yes
Yes
Device Programmer
Yes
Yes
No
No
IAP
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