tmp88cs34ng TOSHIBA Semiconductor CORPORATION, tmp88cs34ng Datasheet - Page 150

• Manufacturer Part Number: tmp88cs34ng
• Description: Cmos 8-bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.14.4
2.14.5
OSD Circuit Control
in addreses 0001DH to 0001FH and 00024H to 00025H in the special function registers
(SFR), and in addresses 00F80H to 00FCEH in the data buffer register (DBR). Section
2.14.6.8 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).
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 (bit 2 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 (bit 2 in ORDON)
is “1”. When this transfer is completed, the flag is cleared to “0”.
The OSD circuit performs control functions using the OSD control registers which reside
Setting the display on-off control bit, DON, (bit 0 in ORDON) to “1” enables display
There is a list of the OSD control registers on pages 199 to 201.
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 (Bit 2 in ORDON)
Note: Don’t write “0” to RGWR.
“0”
“1”
…
…
Initialized state
Transfers written data to OSD circuit.
(After transfer, RGWR is reset to 0.)
88CS34-150
TMP88CS34/CP34
2007-09-12