Intel 8XC196MC User Manual page 516

PPW
The programming pulse width (PPW) register is loaded from the external EPROM (locations 14H and
15H for the 8XC196MC and MD; locations 4014H and 4015H for the 8XC196MH) in auto programming
mode. The PPW_VALUE determines the programming pulse width.
15
PPW15 PPW14
7
PPW7 PPW6
Bit Bit
Number Mnemonic
15:0 PPW15:0
PPW13 PPW12
PPW5 PPW4
PPW_VALUE
This value establishes the programming pulse width for auto programming.
Use the appropriate formula to calculate the PPW_VALUE, then write the
result to the PPW register.
PPW_VALUE for 8XC196MC, MD
PPW_VALUE for 8XC196MH
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PPW11 PPW10
PPW3 PPW2
Function
×
= 62.5 F
XTAL1
×
= 25 F
XTAL1
REGISTERS
PPW
no direct access
8
PPW9 PPW8
0
PPW1 PPW0
C-39