
ST72321xx-Auto Device configuration and ordering information
Doc ID 13829 Rev 1 223/243
21 Device configuration and ordering information
Each device is available for production in user programmable versions (Flash) as well as in
factory coded versions (ROM/FASTROM).
ST72321-Auto devices are ROM versions, ST72P321-Auto devices are Factory Advanced
Service Technique ROM (FASTROM) versions: They are factory-programmed HDFlash
devices. Flash devices are shipped to customers with a default content, whereas
ROM/FASTROM 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/FASTROM devices are factory-configured.
Detailed device configuration and ordering information is presented in the following
Section 21.1: Flash devices and Section 21.2: ROM device ordering information and
transfer of customer code.
21.1 Flash devices
21.1.1 Flash configuration
The option bytes allow 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 the Flash devices directly using ICP, Flash devices are shipped to
customers with the internal RC clock source enabled. In masked ROM devices, the option
bytes are fixed in hardware by the ROM code (see option list).
Table 140. Flash option bytes
Static option byte 0 Static option byte 1
7654321076543210
WDG
Res
VD
Res
PKG0
FMP_R
PKG1
RSTC
OSCTYPE OSCRANGE
PLLOFF
HALTSW 10 10210
Default
value:
1110011111101111
Comentarios a estos manuales