PSD935G2-90U STMicroelectronics, PSD935G2-90U Datasheet - Page 15

• Manufacturer Part Number: PSD935G2-90U
• Manufacturer: STMicroelectronics

Specifications of PSD935G2-90U

• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Package Type: TQFP
• Mounting: Surface Mount
• Pin Count: 80
• Lead Free Status / RoHS Status: Compliant

14
PSD9XX Family
8.0
Register Bit
Definition
(cont.)
Memory_ID0 Register
VM Register
Memory_ID1 Register
Note: Upon reset, Bit1-Bit4 are loaded to configurations selected by the user in PSDsoft. Bit 0 is always cleared
Bit definitions:
Bit 0 0 = PSEN can’t access SRAM in 80C51XA modes.
Bit 1 0 = PSEN can’t access Boot in 80C51XA modes.
Bit 2 0 = PSEN can’t access main Flash in 80C51XA modes.
Bit 3 0 = RD can’t access Boot in 80C51XA modes.
Bit 4 0 = RD can’t access main Flash in 80C51XA modes.
*
Bit definitions:
B_size[3:0] = 0h, Boot block size is 0K bit.
B_size[3:0] = 2h, Boot block size is 256K bit.
B_type[1:0] = 0h, Boot block is Flash memory.
Bit definitions:
F_size[3:0] = 4h, main Flash size is 2M bit.
F_size[3:0] = 5h, main Flash size is 8M bit.
S_size[3:0] = 0h, SRAM size is 0K bit.
S_size[3:0] = 1h, SRAM size is 16K bit.
S_size[3:0] = 3h, SRAM size is 64K bit.
Not used bit should be set to zero.
S_size 3
Bit 7
Bit 7
Bit 7
*
*
by reset. Bit 0 to Bit 4 are active only when the device is configured in Philips 80C51XA mode. Not used
bit should be set to zero.
1 = PSEN can access SRAM in 80C51XA modes.
1 = PSEN can access Boot in 80C51XA modes.
1 = PSEN can access main Flash in 80C51XA modes.
1 = RD can access Boot in 80C51XA modes.
1 = RD can access main Flash in 80C51XA modes.
S_size 2
Bit 6
Bit 6
Bit 6
*
*
S_size 1
B_type 1
Bit 5
Bit 5
Bit 5
*
S_size 0
B_type 0
FL_data
Bit 4
Bit 4
Bit 4
Boot_data
F_size 3
B_size 3
Bit 3
Bit 3
Bit 3
FL_code
F_size 2
B_size 2
Bit 2
Bit 2
Bit 2
PSD935G2
Boot_code SR_code
F_size 1
B_size 1
Bit 1
Bit 1
Bit 1
F_size 0
B_size 0
Bit 0
Bit 0
Bit 0