h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 299

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

10.3.1
DACNT is a 14-bit readable/writable up-counter. The input clock is selected by the clock select bit
(CKS) in DACR. DACNT functions as the time base for both PWM (D/A) channels. When a
channel operates with 14-bit precision, it uses all DACNT bits. When a channel operates with 12-
bit precision, it uses the lower 12 bits and ignores the upper two bits. Since DACNT consists of
16-bit data, DACNT transfers data to the CPU via the temporary register (TEMP). For details,
refer to section 10.4, Bus Master Interface.
Bit Bit Name
7
to
0
Bit Bit Name
7
to
2
1
0
Bit (CPU)
Bit (Counter)
DACNTH
DACNTL
UC7
to
UC0
UC8
to
UC13
—
REGS
PWM (D/A) Counters H and L (DACNTH, DACNTL)
:
:
Initial Value
All 0
Initial Value
All 0
1
1
15
7
14
6
13
5
DACNTH
R/W
R/W
R/W
R/W
R
R/W
12
4
11
3
Description
Upper Up-Counter
Description
Lower Up-Counter
Reserved
This bit is always read as 1 and cannot be modified.
Register Select
DADRA and DACR, and DADRB and DACNT, are
located at the same addresses. The REGS bit specifies
which registers can be accessed.
0: DADRA and DADRB can be accessed
1: DACR and DACNT can be accessed
10
2
9
1
8
0
Rev. 3.00 Mar 21, 2006 page 245 of 788
Section 10 14-Bit PWM Timer (PWMX)
7
8
6
9
10
5
DACNTL
11
4
12
3
REJ09B0300-0300
13
2
—
—
1
REGS
—
0