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关于bq40z50-R3的Authentication问题



你好,我想知道Authentication中,
Generate SHA-1 input block B2 of 512 bits(total input = 128-bit authentication key KD + 160-bit hash HMAC1 + 1 + 159 0s + 100100000)
"+ 1 + 159 0s + 100100000"这部分是什么意思,因为我不论怎么理解都无法得到一个512位长度的消息。
所以能给个这部分示例吗? 后面那个100100000 是1和0是表示位数据还是字符 159 0s 又是什么意思