R0K572115S000BE Renesas Electronics America, R0K572115S000BE Datasheet - Page 253

• Manufacturer Part Number: R0K572115S000BE
• Description: KIT STARTER FOR SH7211
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: Microcontrollerr

Specifications of R0K572115S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7211
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

8.4.6
RTCNT is an 8-bit counter that increments using the clock selected by bits CKS[2:0] in RTCSR.
When RTCNT matches RTCOR, RTCNT is cleared to 0. The value in RTCNT returns to 0 after
counting up to 255. When the RTCNT is written, the upper 16 bits of the write data must be
H'A55A to cancel write protection. This counter is initialized to H'00000000 by a power-on reset
and retains the value by a manual reset and in software standby mode.
Initial value:
Initial value:
Bit
31 to 8
7 to 0
R/W:
R/W:
Bit:
Bit:
Refresh Timer Counter (RTCNT)
Bit Name
⎯
31
15
R
R
0
0
-
-
30
14
R
R
0
0
-
-
29
13
Initial
Value
All 0
All 0
R
R
0
0
-
-
28
12
R
R
0
0
-
-
27
11
R
R
0
0
-
-
R/W
R
R/W
26
10
R
R
0
0
-
-
Description
These bits are always read as 0.
8-Bit Counter
Reserved
25
R
R
0
9
0
-
-
24
R
R
0
8
0
-
-
R/W
23
R
0
7
0
-
Rev. 3.00 Mar. 04, 2009 Page 227 of 1168
R/W
22
R
0
6
0
-
R/W
21
R
0
5
0
-
R/W
20
R
0
4
0
-
R/W
19
R
0
3
0
-
REJ09B0344-0300
R/W
18
R
0
2
0
-
R/W
17
R
0
1
0
-
R/W
16
R
0
0
0
-