UPSD3422_06 Datasheet, PDF (198/293 Pages) STMicroelectronics – Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic

PSD module
Figure 70. VM register control of memories
uPSD34xx
8032 Address
53 Other PLD Inputs
WR
DPLD
CSBOOT0 - CSBOOT3
FS0 - FS7
Main Flash
Memory
CS
WR OE
CS
Secondary
Flash
Memory
WR OE
VM REG BIT 4
VM REG BIT 3
RD
VM REG BIT 2
VM REG BIT 1
PSEN
Figure 71. VM register example corresponding to memory map example
AI10455
8032 Address
53 Other PLD Inputs
DPLD
CSBOOT0 - CSBOOT3
FS0 - FS7
Main Flash
Memory
CS
WR OE
CS
Secondary
Flash
Memory
WR OE
VM Register = 0Ch
PSEN
WR
RD
AI10456
28.3
PSD module data bus width
The PSD Module functions as an 8-bit device to the MCU Module except when the PFQ is
fetching instructions from the Flash memory. When PSEN is active, the PSD Module always
drives 16-bit data out onto the bus.
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