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10-1
CHAPTER 10
PROGRAMMING THE NONVOLATILE MEMORY
The 87C196CB has 56 Kbytes of OTPROM (FF2000–FFFFFFH), while the 8XC196NT has only
32 Kbytes (FF2000–FF9FFFH). The 87C196CB’s programming signals, registers, and proce-
dures are the same as those of the 8XC196NT. This chapter describes the differences in memory
mapping and programming circuits for the 87C196CB.
10.1 SIGNATURE WORD AND PROGRAMMING VOLTAGES
The 87C196CB’s programming voltages are the same of those of the 8XC196NT; however, the
signature word differs. Table 10-1 lists the signature word and programming voltages.
10.2 MEMORY MAP FOR SLAVE PROGRAMMING MODE
Because the 87C196CB has an additional 24 Kbytes of OTPROM, its memory map (Table 10-2)
differs from that of the 8XC196NT. The remaining information on slave programming is correct
for the 87C196CB.
Table 10-1. Signature Word and Programming Voltages
Device
Signature Word Programming V
CC
Programming V
PP
Location Value Location Value Location Value
87C196CB 0070H 87CBH 0072H 40H 0073H 0A0H