tmp88cs38ng TOSHIBA Semiconductor CORPORATION, tmp88cs38ng Datasheet - Page 148

• Manufacturer Part Number: tmp88cs38ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.15.3
2.15.4
OSD Circuit Control
in addresses 0001DH to 0001FH and 00024H to 00025H in the special function registers
(SFR), and in addresses 0F80H to 0FBFH in the data buffer register (DBR). Section
2.15.5.9 shows the OSD control registers. The OSD control registers are used to set display
start position, display character designs (that is, fringing, smoothing, color data, character
size, and etc.), display memory addresses, and character codes.
(Starts display). Setting DON to “0” disables display (Halts display).
Note: The contents of OSD control registers except PIDS, P67S to P64S, ORCLKF, CRCLKC
OSD Control Register Write
and then the data becomes valid. After data is written into an unshaded register, the data
is transferred to the OSD circuit, and then the data becomes valid.
register RGWR (Bit2 in ORDON).
Three instruction cycles later, transfer of the written data to the OSD circuit starts. While
the data is being transferred, data transfer status monitoring flag RGWR (Bit2 in ORDON)
is “1”. When this transfer is completed, the flag is cleared to “0”.
Note: Don’t write “0” to RGWR.
The OSD circuit performs control functions using the OSD control registers which reside
Setting the display on-off control bit, DON, (Bit0 in ORDON) to “1” enables display
There are lists of the OSD control registers on Figure 2.15-30 and Figure 2.15-31.
When data is written into a shaded register, the data is transferred to the OSD circuit,
To transfer the contents of a control register to the OSD circuit, use data transfer request
Setting “1” in the RGWR register outputs the transfer request signal to the OSD circuit.
Written data transfer register (1 bit) ....... RGWR (Bit2 in ORDON)
are initialized in STOP mode. Then, OSD display clock does not stop in STOP mode.
Therefore, clear ORCLKC to “00H” when stop the OSD display clock.
“0”
“1”
.........
.........
Initialized state
Transfers written data to OSD circuit.
(after transfer, RGWR is reset to 0.)
88CS38-148
TMP88CS38/CM38A/CP38A
2007-09-12