st10f272z2 STMicroelectronics, st10f272z2 Datasheet - Page 127

• Manufacturer Part Number: st10f272z2
• Description: 16-bit Mcu With 256 Kbyte Flash Memory And 20 Kbyte Ram
• Manufacturer: STMicroelectronics

ST10F272Z2
Note:
IDPROG (F078h / 3Ch)
Table 59.
All identification words are read only registers.
The values written inside different Identification Register bits are valid only after the Flash
initialization phase is completed. When code execution is started from internal memory (pin
EA held high during reset), the Flash has certainly completed its initialization, so the bits of
Identification Registers are immediately ready to be read out. On the contrary, when code
execution is started from external memory (pin EA held low during reset), the Flash
initialization is not yet completed, so the bits of Identification Registers are not ready. The
user can poll bits 15 and 14 of IDMEM register: when both bits are read low, the Flash
initialization is complete, so all Identification Register bits are correct.
Before Flash initialization completion, the default setting of the different Identification
Registers are the following:
●
●
●
●
PROGVDD
PROGVPP
15
IDMANUF
IDCHIP
IDMEM
IDPROG
Bit
14
IDPROG
13
Programming V
V
following formula: V
Programming V
DD
PROGVPP
12
0403h
110xh (x = silicon revision)
F040h
0040h
voltage when programming EPROM or FLASH devices is calculated using the
R
11
DD
PP
10
voltage (no need of external V
voltage
DD
= 20 x [PROGVDD] / 256 (volts) - 40h for ST10F272Z2 (5 V).
9
ESFR
8
7
Function
6
PP
5
) - 00h
PROGVDD
4
R
3
Reset Value: 0040h
2
Register set
1
127/189
0