- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
82
10.1.8. Conditions for Disabling the Port Drivers
Port driver control is disabled under the following conditions.
Suppression by the parameters
Port drivers do not function with port driver parameters CPUHOLD = 1[h] or PDRHOLD = 1[h].
Judgment to disable them from setting details of the parameter CAT20 PDR corresponding to each port
If the parameter settings meet the following conditions, port drivers set by means of these settings are
disabled.
1. If the category number is "0".
2. If the category number exceeds the maximum category number.
3. If the byte number is "0".
4. If the byte number exceeds the maximum byte number of each category.
5. If the byte number with MSB of the data to specify exceeds the maximum byte number of each category.
If CAT5 (OPDWND1), CAT21 (SOUT1), or CAT22 (SOUT2) are set
Specifying CAT5, CAT21, or CAT22 in the parameter number disables the port drivers.
If combined-use signal output is enabled
Ports of the port drivers (P0 to P15) serve as combined-use output ports for digital out signal output,
VDHD output, OPD Window output, and external EVR CS signal output. As shown in the following table,
port drivers will be disabled from the settings of parameters YDSEL (CAT1_Byte7_bit4), CDSEL
(CAT1_Byte7_bit5), VHOUT (CAT1_Byte11_bit6), UWINDOUT (CAT16_Byte8_bit7), and CSEVRSEL
(CAT12_Byte10_bit1).
If used as REC601 output, none of the port drivers can be used.
If used as REC656 output, P8 to P15 are disabled. If the settings for P3 to P6 are OPD Window out,
VDHD out, or external EVR CS signal output, respectively, the port drivers are disabled.
Table 10.1-7 Combined-Use Terminals for Port Driver Output
Signal output
YDSEL
(MSB side)
CDSEL
(LSB side)
VHOUT
UWINDOUT
CSEVRSEL
Port driver
control
REC656
1
0
Don’t care
Don’t care
Don’t care
P8 to P15
disabled
REC601
Don’t care
1
Don’t care
Don’t care
Don’t care
P0 to P15
disabled
VDHD out
Don’t care
0
1
Don’t care
Don’t care
P5 and P6
disabled
OPD Window
out
Don’t care
0
Don’t care
1
Don’t care
P4
disabled
External EVR
CS signal output
Don’t care
0
Don’t care
Don’t care
1
P3
disabled