用过saa7185芯片的高手看过来

我现在在写saa7185的初始化程序，可是子地址67-6AH部分看不懂，不知怎么设置数值，请高手帮忙，同时我把那段解释放下面

Table 18 Subaddress 67 to 6A
DATA BYTE(1)         DESCRIPTION
L21O0       first byte of captioning data, odd field
L21O1       second byte of captioning data, odd field
L21E0       first byte of extended data, even field
L21E1       second byte of extended data, even field
Note
1. LSBs of the respective bytes are encoded immediately after run-in and framing code, the MSBs of the respective
bytes have to carry the parity bit, in accordance with the definition of line 21 encoding format.

哎，太伤心了，居然没人回，幸好自己搞定了！