IQM_AF_CLKNEG__A
rc = drxj_dap_read_reg16(dev_addr, IQM_AF_CLKNEG__A, &clk_neg, 0);
rc = drxj_dap_write_reg16(dev_addr, IQM_AF_CLKNEG__A, clk_neg, 0);
status = read16(state, IQM_AF_CLKNEG__A, &clk_neg);
status = write16(state, IQM_AF_CLKNEG__A, clk_neg);