st72324bk STMicroelectronics, st72324bk Datasheet - Page 153

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

ST72323 ST72323L
13
13.1
ST72323 device configuration and ordering
information
The device is available for development in a user programmable compatible version
(ST72F324B Flash). 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 using the Option Bytes while the ROM
devices are factory-configured.
Flash memory option bytes (ST72F324B compatible
superset)
Figure 94. Flash memory option bytes
The option bytes allows the hardware configuration of the microcontroller to be selected.
They have no address in the memory map and can be accessed only in programming mode
(for example using a standard ST7 programming tool). The default content of the Flash is
fixed to FFh. To program directly the Flash devices using ICP, Flash devices are shipped to
customers with the internal RC clock source. In masked ROM devices, the option bytes are
fixed in hardware by the ROM code (see option list).
Option byte 0
OPT7 = WDG HALT Watchdog reset on Halt
OPT6 = WDG SW Hardware or software watchdog
OPT5:1 = Reserved, must be kept at default value.
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
This option bit selects the watchdog type.
0: Hardware (watchdog always enabled)
1: Software (watchdog to be enabled by software)
Default
7
1
WDG
1
1
Static option byte 0
0
Reserved
0
ST72323 device configuration and ordering information
1
1
0
1
7
1
1
OSCTYPE
1
1
Static option byte 1
0
0
1
Reserved
1
1
1
0
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