HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 405

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

9.2.12
CNDCR is a 16-bit counter that indicates the number of times the carrier could not be detected
while the preamble was being sent. When the value in this register reaches H'FFFF (65,535), the
count is halted. The counter value is cleared to 0 by a write to this register (the write value is
immaterial).
Bits 31 to 16—Reserved: These bits are always read as 0. The write value should always be 0.
Bits 15 to 0—Carrier Not Detect Count 15 to 0 (CNDC15 to CNDC0): These bits indicate the
number of times the carrier was not detected.
Initial value:
Initial value:
Initial value:
Carrier Not Detect Counter Register (CNDCR)
R/W:
R/W:
R/W:
Bit:
Bit:
Bit:
CNDC15 CNDC14 CNDC13 CNDC12 CNDC11 CNDC10 CNDC9 CNDC8
CNDC7 CNDC6 CNDC5 CNDC4 CNDC3 CNDC2 CNDC1 CNDC0
R/W
R/W
31
—
15
0
R
0
7
0
R/W
R/W
30
—
14
0
R
0
6
0
R/W
R/W
29
—
13
0
R
0
5
0
R/W
R/W
. . .
. . .
. . .
. . .
12
0
4
0
R/W
R/W
19
—
11
0
R
0
3
0
R/W
R/W
18
—
10
0
R
0
2
0
R/W
R/W
17
—
0
R
9
0
1
0
R/W
R/W
16
—
0
R
8
0
0
0
389