UPSD3254 STMICROELECTRONICS [STMicroelectronics], UPSD3254 Datasheet - Page 138

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

UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV
Table 102. Power Management Mode Registers PMMR2
Note: The bits of this register are cleared to zero following Power-up. Subsequent RESET pulses do not clear the registers.
Table 103. APD Counter Operation
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Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
X
X
PLD Array
WR
PLD Array
RD
PLD Array
PSEN
PLD Array
ALE
X
X
APD Enable Bit
0
1
1
0
0
0 = on WR input to the PLD AND Array is connected.
1 = off WR input to PLD AND Array is disconnected, saving power.
0 = on RD input to the PLD AND Array is connected.
1 = off RD input to PLD AND Array is disconnected, saving power.
0 = on PSEN input to the PLD AND Array is connected.
1 = off PSEN input to PLD AND Array is disconnected, saving power.
0 = on ALE input to the PLD AND Array is connected.
1 = off ALE input to PLD AND Array is disconnected, saving power.
0
0
Not used, and should be set to zero.
Not used, and should be set to zero.
Not used, and should be set to zero.
Not used, and should be set to zero.
ALE Level
Pulsing
0 or 1
X
Not Counting
Not Counting
Counting (Generates PDN after 15 Clocks)
APD Counter