ST72264G2 STMicroelectronics, ST72264G2 Datasheet - Page 162

• Manufacturer Part Number: ST72264G2
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72264G2

• 4 K Or 8 Kbytes Program Memory: ROM or single voltage extended Flash (XFlash) with read-out protection, write protection, In-Circuit Programming and In-Application Programming (ICP and IAP). 10K write/erase cycles guaranteed, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt,Wait and Slow
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and Pulse generator modes

ST72260Gx, ST72262Gx, ST72264Gx
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/FASTROM).
ST7226x devices are ROM versions. ST72P26x
devices are Factory Advanced Service Technique
ROM (FASTROM) versions: they are factory-pro-
grammed XFlash devices.
ST72F26x XFlash devices are shipped to custom-
ers with a default program memory content (FFh).
The option bytes are programmed to enable the in-
ternal RC oscillator. The ROM/FASTROM factory
coded parts contain the code supplied by the cus-
tomer. This implies that FLASH devices have to be
configured by the customer using the Option Bytes
while the ROM/FASTROM devices are factory-
configured.
15.1 OPTION BYTES
The two option bytes allow the hardware configu-
ration of the microcontroller to be selected.
The option bytes have 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.
In masked ROM devices, the option bytes are
fixed in hardware by the ROM code (see option
list).
USER OPTION BYTE 0
OPT 7 = WDG HALT Watchdog reset on HALT
This option bit determines if a RESET is generated
when entering HALT mode while the Watchdog is
active.
0: No Reset generation when entering Halt mode
1: Reset generation when entering Halt mode
OPT 6 = WDG SW Hardware or software watch-
dog
This option bit selects the watchdog type.
0: Hardware (watchdog always enabled)
1: Software (watchdog to be enabled by software)
162/172
Default
Value
HALT
WDG
7
1
WDG
SW
1
USER OPTION BYTE 0
VD1 VD0
1
1
SEC
1
1
SEC
0
1
FMP
R
0
FMP
W
0
0
OPT 5:4 = VD[1:0] Voltage detection selection
These option bits enable the voltage detection
block (LVD and AVD) with a selected threshold of
the LVD and AVD.
OPT 3:2 = SEC[1:0] Sector 0 size definition
These option bits indicate the size of sector 0 ac-
cording to the following table.
Note 1: 4k available on FASTROM devices only.
OPT 1 = FMP_R Read-out protection
Read-out protection, when selected, provides a
protection against Program Memory content ex-
traction and against write access to Flash memo-
ry.
Erasing the option bytes when the FMP_R option
is selected will cause the whole memory to be
erased first, and the device can be reprogrammed.
Refer to
ming Reference Manual for more details.
0: Read-out protection off
1: Read-out protection on
EXTIT Res.
Sector 0 Size
LVD Off
Lowest Voltage Threshold (∼3.05V)
Medium Voltage Threshold (∼3.6V)
Highest Voltage Threshold (∼4.1V)
1
7
4k
0.5k
1k
2
1)
Section 4.5
1
Configuration
TYPE
OSC
USER OPTION BYTE 1
1
1
TYPE
OSC
SEC1
and the ST7 Flash Program-
0
0
0
0
1
1
RNGE
OSC
2
1
RNGE
OSC
1
1
RNGE
SEC0
OSC
VD1
0
1
1
1
0
0
0
1
0
1
VD0
OFF
0
PLL
1
0
1
0
1
1