參數(shù)資料
型號(hào)： PSD4235G2-90UT
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 256K X 16 FLASH, 52 I/O, PIA-GENERAL PURPOSE, PQFP80
封裝： PLASTIC, TQFP-80
文件頁(yè)數(shù)： 17/100頁(yè)
文件大?。?/td> 933K
代理商： PSD4235G2-90UT
23/100
PSD4235G2
Table 23. PMMR0 Register
Note: The bits of this register are cleared to zero following Power-up. Subsequent Reset (Reset) pulses do not clear the registers.
Note: Bit Definitions:
APD Enable
0 = Automatic Power-down (APD) is disabled.
1 = Automatic Power-down (APD) is enabled.
PLD Turbo
0 = PLD Turbo is on.
1 = PLD Turbo is off, saving power.
PLD Array CLK
0 = CLKIN to the PLD AND array is connected. Every CLKIN change powers up the PLD when Turbo bit is off.
1 = CLKIN to the PLD AND array is disconnected, saving power.
PLD MCells CLK 0 = CLKIN to the PLD Macrocells is connected.
1 = CLKIN to the PLD Macrocells is disconnected, saving power.
Table 24. PMMR2 Register
Note: For Bit 4, Bit 3, Bit 2: See Table 34 for the signals that are blocked on pins CNTL0-CNTL2.
Note: Bit Definitions:
PLD Array Addr
0 = Address A7-A0 are connected to the PLD array.
1 = Address A7-A0 are blocked from the PLD array, saving power.
(Note: in XA mode, A3-A0 come from PF3-PF0, and A7-A4 come from ADIO7-ADIO4)
PLD Array CNTL2 0 = CNTL2 input to the PLD AND array is connected.
1 = CNTL2 input to the PLD AND array is disconnected, saving power.
PLD Array CNTL1 0 = CNTL1 input to the PLD AND array is connected.
1 = CNTL1 input to the PLD AND array is disconnected, saving power.
PLD Array CNTL0 0 = CNTL0 input to the PLD AND array is connected.
1 = CNTL0 input to the PLD AND array is disconnected, saving power.
PLD Array ALE
0 = ALE input to the PLD AND array is connected.
1 = ALE input to the PLD AND array is disconnected, saving power.
PLD Array WRH 0 = WRH/DBE input to the PLD AND array is connected.
1 = WRH/DBE input to the PLD AND array is disconnected, saving power.
Table 25. VM Register
Note: On reset, Bit1-Bit4 are loaded to configurations that are selected by the user in PSDsoft Express. Bit0 and Bit7 are always cleared on
reset. Bit0-Bit4 are active only when the device is configured in Philips 80C51XA mode.
Note: Bit Definitions:
SR_code
0 = PSEN cannot access SRAM in 80C51XA modes.
1 = PSEN can access SRAM in 80C51XA modes.
Boot_code
0 = PSEN cannot access Secondary NVM in 80C51XA modes.
1 = PSEN can access Secondary NVM in 80C51XA modes.
FL_code
0 = PSEN cannot access Primary Flash memory in 80C51XA modes.
1 = PSEN can access Primary Flash memory in 80C51XA modes.
Boot_data
0 = RD cannot access Secondary NVM in 80C51XA modes.
1 = RD can access Secondary NVM in 80C51XA modes.
FL_data
0 = RD cannot access Primary Flash memory in 80C51XA modes.
1 = RD can access Primary Flash memory in 80C51XA modes.
Peripheral mode
0 = Peripheral mode of Port F is disabled.
1 = Peripheral mode of Port F is enabled.
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1
Bit 0
not used
(set to ’0’)
not used
(set to ’0’)
PLD
MCells CLK
PLD
Array CLK
PLD
Turbo
not used
(set to ’0’)
APD
Enable
not used
(set to ’0’)
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1
Bit 0
not used
(set to ’0’)
PLD
Array WRH
PLD
Array ALE
PLD Array
CNTL2
PLD Array
CNTL1
PLD Array
CNTL0
not used
(set to ’0’)
PLD
Array Addr
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1
Bit 0
Peripheral
mode
not used
(set to ’0’)
not used
(set to ’0’)
FL_data
Boot_data
FL_code
Boot_code
SR_code
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