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PSD835G2 Datasheet(PDF) 73 Page - STMicroelectronics

Part # PSD835G2
Description  Flash PSD, 5V Supply, for 8-bit MCUs 4 Mbit 256 Kbit Dual Flash Memories and 64 Kbit SRAM
PDF  102 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PSD835G2 Datasheet(HTML) 73 Page - STMicroelectronics

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PSD835G2
Input Control Signals
The PSD provides the option to turn off the ad-
dress input (A7-A0) and input control signals
(CNTL0, CNTL1, CNTL2, Address Strobe (ALE/
AS, PD0) and DBE) to the PLD to save AC power
consumption. These signals are inputs to the PLD
AND Array. During Power-down mode, or, if any of
them are not being used as part of the PLD logic
equation, these signals should be disabled to save
AC power. They are disconnected from the PLD
AND Array by setting Bits 0, 2, 3, 4, 5, and 6 to a
‘1’ in PMMR2.
Table 46. APD Counter Operation
APD Enable Bit
ALE PD Polarity
ALE Level
APD Counter
0
X
X
Not Counting
1
X
Pulsing
Not Counting
1
1
1
Counting (Generates PDN after 15 Clocks)
1
0
0
Counting (Generates PDN after 15 Clocks)



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