Specifications
8.8.1 Long Duration Timer/Periodic Interrupt Timer Low Byte
765 43 2 1 0
|________|________|_________|________|_________|_________|_________|_________|
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LDT7 LDT6 LDT5 LDT4 LDT3 LDT2 LDT1 LDT0
Bits7-0:LowByte of LDT/PIT (Read/Write)
Reading this register causes the current value of the LDT to be transferred to a holding register.
This allows a stable 4-byte count to be read. The low byte of the holding register is returned by
the read.
Writing to this register loads a value into the low byte of the LDT/PIT counter. The counter
should be stopped when writing or the result will be indeterminate.
8.8.2 Long Duration Timer/Periodic Interrupt Timer Mid-low Byte
765 43 2 1 0
|________|________|_________|________|_________|_________|_________|_________|
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LDT15 LDT14 LDT13 LDT12 LDT11 LDT10 LDT9 LDT8
Bits7-0:Mid-low Byte of LDT/PIT (Read/Write)
Reading this register returns the mid-low byte of the holding register.
Writing this register loads a value into the mid-low byte of the LDT/PIT counter.
The counter should be stopped when writing or the result will be indeterminate.
8.8.3 Long Duration Timer/Periodic Interrupt Timer Mid-high Byte
765 43 2 1 0
|________|________|_________|________|_________|_________|_________|_________|
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LDT23 LDT22 LDT21 LDT20 LDT19 LDT18 LDT17 LDT16
Bits7-0:Mid-high Byte of LDT (Read/Write)
Reading this register returns the mid-high byte of the holding register.
Writing to this register loads a value into the mid-high byte of the LDT counter. The counter
should be stopped when writing or the result will be indeterminate.
8.8.4 Long Duration Timer/Periodic Interrupt Timer High Byte
765 43 2 1 0
|________|________|_________|________|_________|_________|_________|_________|
||| || | | |
LDT31 LDT30 LDT29 LDT28 LDT27 LDT26 LDT25 LDT24
Bits7-0:High Byte of LDT (Read/Write)
Reading this register returns the high byte of the holding register.
Writing to this register loads a value into the high byte of the LDT counter. The counter should
be stopped when writing or the result will be indeterminate.
VP 110/01x 8-15
Additional Local I/O Functions