IN11IN22IN33IN44IN55IN66WCT7CMOUT8RLDOUT9RLDINV10RLDIN11RLDREF12SYNCB13VSSIO14ALARMB15CSB16SCLK17SDI18SDO19DRDYB20CLK21VDDIO22XTAL123XTAL224RSTB25CVREF26VSS27VDD28EXP29