SH7709_PEDR
_reg_write_1(SH7709_PEDR, scan[column].e);
_reg_write_1(SH7709_PEDR, 0xff);
ed = _reg_read_1(SH7709_PEDR) & ~PFCKBD_HITACHI_PEDR_SCN_MASK;
_reg_write_1(SH7709_PEDR, ed | scan[i].e);
ed = _reg_read_1(SH7709_PEDR) & ~PFCKBD_HITACHI_PEDR_SCN_MASK;
_reg_write_1(SH7709_PEDR, ed | poll.e);