ST7265XEVALMS STMicroelectronics, ST7265XEVALMS Datasheet - Page 154

• Manufacturer Part Number: ST7265XEVALMS
• Manufacturer: STMicroelectronics

Specifications of ST7265XEVALMS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

ST7265x
15 DEVICE CONFIGURATION AND ORDERING INFORMATION
Each device is available for production in user pro-
grammable versions (FLASH) as well as in factory
coded versions (ROM). FLASH devices are
shipped to customers with a default content (FFh),
while ROM factory coded parts contain the code
supplied by the customer. This implies that FLASH
devices have to be configured by the customer us-
ing the Option Bytes while the ROM devices are
factory-configured.
15.1 OPTION BYTE
The option byte allows the hardware configuration
of the microcontroller to be selected.
The option byte has no address in the memory
map and can be accessed only in programming
mode (for example using a standard ST7 program-
ming tool). The default content of the FLASH is
fixed to FFh. This means that all the options have
“1” as their default value.
In masked ROM devices, the option byte is fixed in
hardware by the ROM code (see option list)
OPT7 = Reserved. Must be kept at 1.
OPT6 = PE5PU I/O Port PE5 Pull-up Option
This option bit determines if a pull-up is connected
on Port E5.
0: Pull up present on PE5
1: No pull-up on PE5
When PE5PU=00, (also refer to
– For input, software can enable or disable the
– For output, the pull-up is enabled when Open
154/163
pull-up by programming PEOR.5 and PED-
DR.5=0.
Drain is selected by programming PEOR.5= and
PEDDR.5=1.
7
-
PE5
PU
MOD1
PS
MOD0
PS
-
WDG
Table
SW
USB
39):
EN
FMP_
R
0
Table 39. PE5PU Options
OPT5:4 = PSMOD[1:0] Power Supply Mode
These option bits configure the power supply
mode. Refer to
Table 40. Power supply bits
OPT3 = Reserved. Must be kept at 1.
OPT2= WDG SW Hardware or software watchdog
This option bit selects the watchdog type.
0: Hardware (watchdog always enabled)
1: Software (watchdog to be enabled by software)
OPT1 = USBEN
0: USBEN alternate function disabled. Port F4 is
1: USBEN alternate function enabled on Port F4
OPT0= FMP_R Flash memory read-out protection
Readout protection, when selected provides a pro-
tection against program memory content extrac-
tion and against write access to Flash memory.
This protection is based on read and a write pro-
tection of the memory in test modes and IAP.
Input floating
Output Open Drain
with Pull-up
Input with pull-up
Output push pull
Input floating
Output Open Drain
Input floating
Output push pull
Forced Stand-
alone mode
Normal Dual-
Supply mode
Forced USB
mode
free for general purpose I/O
(function controlled by hardware)
Configuration
Mode
Table 40
Detector
Voltage
Ignored
Ignored
Read
USB
OPTION
PE5PU
0
1
for more information.
Determined
Not Started
by detector
Started
value
PLL
PEOR.5
0
0
1
1
0
0
1
1
OPT5 OPT4
0
1
x
PEDDR.5
1
1
1
0
1
0
0
0
0
1
0