Fujitsu 8FX User Manual

MB95630H Series
MN702-00009-2v0-E FUJITSU SEMICONDUCTOR LIMITED 345
CHAPTER 19 16-BIT PPG TIMER
19.7 Registers
19.7.1 16-bit PPG Downcounter Register (Upper/Lower)
ch. n (PDCRHn/PDCRLn)
The 16-bit PPG downcounter register (upper) ch. n (PDCRHn) and the 16-bit
PPG downcounter register (lower) ch. n (PDCRLn) form a 16-bit register that is
used to read the count value from the 16-bit PPG downcounter.
■ Register Configuration
■ Register Functions
These registers form a 16-bit register that is used to read the count value from the 16-bit
downcounter. The initial values of the register are all "0".
Always use one of the following procedures to read from this register.
• Use the "MOVW" instruction (use a 16-bit access instruction to read the PDCRHn register
address).
• Use the "MOV" instruction and read PDCRHn first and then PDCRLn (reading PDCRHn
automatically copies the lower 8 bits of the downcounter to PDCRLn).
This register is read-only and writing a value to this register has no effect on the operation.
Note:
If you use the "MOV" instruction and read PDCRLn before PDCRHn, PDCRLn returns the
value from the previous valid read operation. Therefore, the value of the 16-bit
downcounter cannot be read correctly.
PDCRHn
bit 7 6 5 4 3 2 1 0
Field DC15 DC14 DC13 DC12 DC11 DC10 DC09 DC08
Attribute R R R R R R R R
Initial value 0 0 0 0 0 0 0 0
PDCRLn
bit 7 6 5 4 3 2 1 0
Field DC07 DC06 DC05 DC04 DC03 DC02 DC01 DC00
Attribute R R R R R R R R
Initial value 0 0 0 0 0 0 0 0

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English