PSD4235G2-90U STMicroelectronics, PSD4235G2-90U Datasheet - Page 2

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PSD4235G2-90U

Manufacturer Part Number
PSD4235G2-90U
Description
IC FLASH 4MBIT 90NS 80TQFP
Manufacturer
STMicroelectronics
Datasheet

Specifications of PSD4235G2-90U

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
0°C ~ 70°C
Package / Case
80-TQFP, 80-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-1968

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Part Number:
PSD4235G2-90UI
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Contents
Contents
1
2
3
4
5
6
2/129
Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.1
1.2
1.3
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
PSD architectural overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Development system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
PSD register description and address offsets . . . . . . . . . . . . . . . . . . . 26
Register bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.1
6.2
6.3
6.4
ISP via JTAG port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
In-System Programming (ISP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Page register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Power management unit (PMU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
In-system programming (ISP) via JTAG . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.1.1
1.1.2
1.1.3
In-application programming (IAP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.2.1
1.2.2
1.2.3
PSDsoft™ Express . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
PLDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
MCU bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
In-application programming (IAP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Data-In registers - port A, B, C, D, E, F, G . . . . . . . . . . . . . . . . . . . . . . . . 28
Data-out registers - port A, B, C, D, E, F, G . . . . . . . . . . . . . . . . . . . . . . . 28
Direction registers - ports A, B, C, D, E, F, G . . . . . . . . . . . . . . . . . . . . . . 28
Control registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
First time programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Inventory build-up of pre-programmed devices . . . . . . . . . . . . . . . . . . . 12
Expensive sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Simultaneous READ and WRITE to Flash memory . . . . . . . . . . . . . . . . 13
Complex memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Separate Program and Data space . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
PSD4235G2

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