psd835g2 STMicroelectronics, psd835g2 Datasheet - Page 2

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psd835g2

Manufacturer Part Number
psd835g2
Description
Configurable Memory System On A Chip For 8-bit Microcontrollers
Manufacturer
STMicroelectronics
Datasheet

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Contents
Contents
1
2
3
4
5
6
2/120
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1
1.2
1.3
PSD architectural overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
Development system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
PSD register description and address offset . . . . . . . . . . . . . . . . . . . . 24
Register bit definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Detailed operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.1
6.2
6.3
6.4
JTAG port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Power management unit (PMU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
In-System Programming (ISP) via JTAG . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1.1
1.1.2
1.1.3
In-application programming (IAP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.2.1
1.2.2
1.2.3
PSDsoft™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Page register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
PLDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
MCU bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
In-system programming (ISP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
In-application reprogramming (IAP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Memory blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Primary Flash memory and secondary Flash memory description . . . . . 33
Memory Block Select signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Upper and lower block in main Flash sector . . . . . . . . . . . . . . . . . . . . . . . 33
First time programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Inventory build-up of preprogrammed devices . . . . . . . . . . . . . . . . . . . . 11
Expensive sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Simultaneous READ and WRITE to Flash memory . . . . . . . . . . . . . . . . 12
Complex memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Separate program and data space . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
PSD835G2

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