UPSD3422_06 Datasheet, PDF (247/293 Pages) STMicroelectronics – Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic

uPSD34xx
PSD module
Figure 89. Automatic power-down (APD) unit
8032 ADDR FROM MCU MODULE
8032 DATA FROM MCU MODULE
PMMR3, BIT 1 (FORCE_PD)
PMMR0, BIT 1 (APD EN)
8032 ALE
1 = FOUND
ENABLE _TRANSITION
TRANSITION
DETECTION
PSD MODULE RST_
CSI (pin PD2)
1 = FOUND
EDGE
EDGE
DETECTION
ENABLE
FULL
CLEAR _COUNT
4-BIT APD
UP-COUNTER
CLK
8032 ADDR
8032 DATA
PSD
MODULE
LINE
PDN
BUFFERS
ENABLE
1 = POWER
DOWN MODE
FSx
PDN
CSI
DPLD CHIP
SELECT
EQUATIONS
CSBOOTx
RS0
CSIOP
CLKIN (pin PD1)
WHEN CSI FUNCTION IS SPECIFIED IN PSDSOFT EXPRESS,
CSI IS PART OF EQUATIONS FOR FSx, CSBOOTx, RS0, and CSIOP
PDN
GPLD
OMC OUTPUTS
AI06608B
Figure 90. Power-down mode flow chart
RESET
Enable APD.
Set PMMR0,
Bit 1 = 1
OPTIONAL. Disable desired inputs to
PLDs by setting PMMR0 bits 4 and 5,
and PMMR2 bits 2 through 6
NO
ALE idle
for 15 CLKIN
clocks?
YES
PDN = 1, PSD
Module in Power-
Down Mode
AI09183
28.5.54
Chip select input (CSI)
Pin PD2 of Port D can optionally be configured in PSDsoft Express as the PSD Module Chip
Select Input, CSI, which is an active-low logic input. By default, pin PD2 does not have the
CSI function.
When the CSI function is specified in PSDsoft Express, the CSI signal is automatically
included in DPLD chip select equations for FSx, CSBOOTx, RS0, and CSIOP. When the CSI
pin is driven to logic ’0’ from an external device, all of these memories will be available for
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