PSD834210MIT datasheet(58/89 Pages) STMICROELECTRONICS

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PSD834F2V

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Table 29. Power Management Mode Registers PMMR01

PLD Power Management

The power and speed of the PLDs are controlled

by the Turbo bit (bit 3) in PMMR0. By setting the

bit to 1, the Turbo mode is off and the PLDs con-

sume the specified stand-by current when the in-

puts are not switching for an extended time of

70 ns. The propagation delay time is increased by

10 ns after the Turbo bit is set to 1 (turned off)

when the inputs change at a composite frequency

of less than 15 MHz. When the Turbo bit is reset to

0 (turned on), the PLDs run at full power and

speed. The Turbo bit affects the PLD’s DC power,

AC power, and propagation delay.

Blocking MCU control signals with the bits of

PMMR2 can further reduce PLD AC power con-

sumption.

Table 30. Power Management Mode Registers PMMR21

Note: 1. The bits of this register are cleared to zero following Power-up. Subsequent Reset (Reset) pulses do not clear the registers.

Bit 0

Not used, and should be set to zero.

Bit 1

APD Enable

0 = off Automatic Power-down (APD) is disabled.

1 = on Automatic Power-down (APD) is enabled.

Bit 2

Not used, and should be set to zero.

Bit 3

PLD Turbo

0 = on PLD Turbo mode is on

1 = off PLD Turbo mode is off, saving power.

Bit 4

PLD Array clk

0 = on

CLKIN (PD1) input to the PLD AND Array is connected. Every change of CLKIN

(PD1) Powers-up the PLD when Turbo bit is 0.

1 = off CLKIN (PD1) input to PLD AND Array is disconnected, saving power.

Bit 5

PLD MCell clk

0 = on CLKIN (PD1) input to the PLD macrocells is connected.

1 = off CLKIN (PD1) input to PLD macrocells is disconnected, saving power.

Bit 6

Not used, and should be set to zero.

Bit 7

Not used, and should be set to zero.

Bit 0

Not used, and should be set to zero.

Bit 1

Not used, and should be set to zero.

Bit 2

PLD Array

CNTL0

0 = on Cntl0 input to the PLD AND Array is connected.

1 = off Cntl0 input to PLD AND Array is disconnected, saving power.

Bit 3

PLD Array

CNTL1

0 = on Cntl1 input to the PLD AND Array is connected.

1 = off Cntl1 input to PLD AND Array is disconnected, saving power.

Bit 4

PLD Array

CNTL2

0 = on Cntl2 input to the PLD AND Array is connected.

1 = off Cntl2 input to PLD AND Array is disconnected, saving power.

Bit 5

PLD Array

ALE

0 = on ALE input to the PLD AND Array is connected.

1 = off ALE input to PLD AND Array is disconnected, saving power.

Bit 6

PLD Array

DBE

0 = on DBE input to the PLD AND Array is connected.

1 = off DBE input to PLD AND Array is disconnected, saving power.

Bit 7

Not used, and should be set to zero.

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