PSD835G2-90UI STMicroelectronics, PSD835G2-90UI Datasheet - Page 28

• Manufacturer Part Number: PSD835G2-90UI
• Description: IC FLASH 4MBIT 90NS 80TQFP
• Manufacturer: STMicroelectronics

Specifications of PSD835G2-90UI

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 4M (512K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2016

Register bit definition
28/120
Mask macrocells A register
Mask macrocells B register
Flash Memory Protection register
Flash Boot Protection register
JTAG Enable register
Security_Bit
McellA<i>_Prot 0 = Allow MCellA<i> flip-flop to be loaded by MCU (default).
McellB<i>_Prot 0 = Allow MCellB<i> flip-flop to be loaded by MCU (default).
Sec7_Prot
not used
Mcella 7
Mcellb 7
JTAG_Enable 1 = JTAG port is enabled.
Sec<i>_Prot 1 = Secondary Flash memory Sector <i> is write protected.
Bit 7
Bit 7
Bit 7
Sec<i>_Prot 1 = Primary Flash memory Sector <i> is write protected.
Bit 7
Bit 7
Security_Bit 0 = Security bit in device has not been set.
Sec6_Prot
not used
not used
Mcella 6
Mcellb 6
Bit 6
Bit 6
Bit 6
Bit 6
Bit 6
0 = Secondary Flash memory Sector <i> is not write protected.
1 = Security bit in device has been set.
0 = JTAG port is disabled.
1 = Prevent MCellA<i> flip-flop from being loaded by MCU.
1 = Prevent MCellB<i> flip-flop from being loaded by MCU.
0 = Primary Flash memory Sector <i> is not write protected.
Sec5_Prot
not used
not used
Mcella 5
Mcellb 5
Bit 5
Bit 5
Bit 5
Bit 5
Bit 5
Sec4_Prot
Mcella 4
Mcellb 4
not used
not used
Bit 4
Bit 4
Bit 4
Bit 4
Bit 4
Read-only registers
Sec3_Prot
Sec3_Prot
Mcella 3
Mcellb 3
not used
Bit 3
Bit 3
Bit 3
Bit 3
Bit 3
Sec2_Prot
Sec2_Prot
not used
Mcella 2
Mcellb 2
Bit 2
Bit 2
Bit 2
Bit 2
Bit 2
Sec1_Prot
Sec1_Prot
not used
Mcella 1
Mcellb 1
Bit 1
Bit 1
Bit 1
Bit 1
Bit 1
PSD835G2
JTAGEnable
Sec0_Prot
Sec0_Prot
Mcella 0
Mcellb 0
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0