nrf.setCE = function (state, block) {
if (typeof state === 'string') ce.mode(state);
else ce.value(state);
if (nrf._debug) console.log("Set CE "+state+".");
if (block) nrf.blockMicroseconds(nrf._T[block]); // (assume ce changed TX/RX mode)
};
if (val !== d[0] || reg === _statusReg) nrf.execCommand(['W_REGISTER', reg], [val], function () {
if (settlingNeeded) nrf.blockMicroseconds(settlingNeeded); // see p.24
cb.apply(this, arguments);
});