M16C26A Datasheet, PDF (146/352 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/Tiny SERIES

M16C/26A Group (M16C/26A, M16C/26B, M16C/26T)
12. Timer
12.3.1.2 Position-data-retain Function Control Register
Figure 12.3.1.2.1 shows the structure of the position-data-retain function contol register.
Position-data-retain function control register ⁽¹⁾
b7
b3 b2 b1 b0
Symbol
PDRF
Address
034E16
When reset
XXXX 00002
Bit symbol
Bit name
Function
RW
PDRW
W-phase position
data retain bit
Input level at pin IDW is read out.
0: "L" level
1: "H" level
RO
PDRV
V-phase position
data retain bit
Input level at pin IDV is read out.
0: "L" level
1: "H" level
RO
PDRU
U-phase position
data retain bit
Input level at pin IDU is read out.
0: "L" level
1: "H" level
RO
PDRT
Retain-trigger
0: Rising edge of positive phase
polarity select bit 1: Falling edge of positive phase
RW
(b7-b4)
Nothing is assigned. When write, set to "0". When read,
contents are indeterminate.
NOTE:
1. This register is valid only in the three-phase mode.
Figure 12.3.1.2.1. PDRF Register
12.3.1.2.1 W-phase Position Data Retain Bit (PDRW)
This bit is used to retain the input level at pin IDW.
12.3.1.2.2 V-phase Position Data Retain Bit (PDRV)
This bit is used to retain the input level at pin IDV.
12.3.1.2.3 U-phase Position Data Retain Bit (PDRU)
This bit is used to retain the input level at pin IDU.
12.3.1.2.4 Retain-trigger Polarity Select Bit (PDRT)
This bit is used to select the trigger polarity to retain the position data.
When this bit is set to "0", the rising edge of each positive phase selected.
When this bit is set to "1", the falling edge of each pocitive phase selected.
Rev. 2.00 Feb.15, 2007 ^{page 129} of 329
REJ09B0202-0200