Rev. 1.0, 02/00, page 687 of 1141
26.13.5
Register Description
CTL Control Register (CTCR)
0
0
1
0
R
2
0
W
3
0
4
1
W
5
1
6
0
7
W
W
W
FSLB
W
FSLC
0
W
NT/PL
FSLA
CCS
LCTL
UNCTL
SLWM
Bit :
Initial value :
R/W :
CTCR is an 8-bit read/write register that controls PB-CTL rewrite and sets the slow mode. When
CTL pulse cannot be detected with the input amplifier gain set at the CTL gain control register
(CTLGR) in PB-CTL circuit, bit 1 (UNCTL) of CTCR is set to 1. It is automatically cleared to 0
when CTL pulse is detected.
Bit 1 is read-only, and the rest are write-only. If a read is attempted to a write-only bit, an
undetermined value is read out.
CTCR is initialized to H'30 by a reset, and in standby and module stop mode.
Bit 7
NTSC/PAL Select (NT/PL): Selects the period of the rewrite circuit.
Bit 7
NT/PL
Description
0
NTSC mode (frame rate: 30 Hz)
(Initial value)
1
PAL mode (frame rate: 25 Hz)
Bits 6 to 4
Frequency Select (FSLA, FSLB, FSLC); These bits select the operating frequency
of the CTL write circuit. They should be set according to fOSC.
Bit 1
Bit 0
Bit 0
FSLC
FSLB
FSLA
Description
0
Reserved (do not use this setting)
0
1
Reserved (do not use this setting)
0
fosc = 8 MHz
0
1
1
fosc = 10 MHz
(Initial value)
1
*
*
Reserved (do not use this setting)
Note:
*
Don't care.