Operating Environment - Intel 8XC196NT User Manual

Table 15-8. Slave Programming Mode Memory Map
Description
OTPROM
OFD
†
DED
†
DEI
PCCB
Programming voltages (see Table 15-7 on page 15-16)
Signature word
†
These bits program the UPROM cells. Once these bits are programmed, they cannot be erased and
dynamic failure analysis of the device is impossible.

15.8.3 Operating Environment

The chip configuration registers (CCRs) define the system environment. Since the programming
environment is not necessarily the same as the application environment, the device provides a
means for specifying different configurations. Specify your application environment in the chip
configuration bytes (CCBs) located in the OTPROM. Specify your programming environment in
the programming chip configuration bytes (PCCBs) located in the test ROM.
Figure 15-6 shows an abbreviated description of the CCRs with the default PCCB environment
settings. The reset sequence loads the CCRs from the CCBs for normal operation and from the
PCCBs when entering programming modes. You can program the CCBs using any of the pro-
gramming methods, but only slave mode allows you to program the PCCBs. Chapter 14, "Inter-
facing with External Memory," describes the system configuration options, and "Controlling
Access to Internal Memory" on page 15-3 describes the memory protection options.
PROGRAMMING THE NONVOLATILE MEMORY
Address
2000–9FFFH OTPROM Cells
0072H, 0073H Read Only
Comments
0778H OTPROM Cell
0758H UPROM Cell
0718H UPROM Cell
0218H Test EPROM
0070H Read Only
15-17