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| Microcontrollers ApNote APXXXX01.EXE available AP1613 o additional file Bootstrap Loader Versions Any current step of the SAB 80C166, C167 and C165 except of the respective bond-out chips implements an on-chip bootstrap loader. Hans Sulzer / Siemens MC Semiconductor Group 03.97, Rel. 01 Bootstrap Loader Versions Question: Which version of the on-chip boostrap loader is implemented in which derivative and step of the 80C166, C167 and C165 microcontroller families? Answer: Any current step of the SAB 80C166, C167 and C165 except of the respective bond-out chips implements an on-chip bootstrap loader. For the 80C166/83C166, the bootstrap loader was introduced at first with the CB-step, for the 88C166 (Flash) with the ES1-BA step. All current bootstrap loaders expect the same number of bytes to be loaded: 32 bytes. The acknowledge byte sent back by the bootstrap loader is meant as an additional identification mark for the membership of a particular microcontroller family. Please see the table below for more details. The way how the bootstrap mode is entered in the 80C166 family (ALE pulled high and NMI# activated after a hardware reset) differs from that in the C167/C165 family (P0L.4 pulled low after a hardware reset). Note however, that NMI# has still to be activated in C167 steps less than or equal to step AC due to an hardware bug in these steps. Chip C161RI C161V C161K/C161O C163 C163-16F C164CI C165 80C166/83C166 Step any any any any CA CB 88C166 ES-BA ES1-BA C167 ES-AC AC BA C167XX any Bootstrap Loader 32 bytes version not implemented 32 bytes version not implemented not implemented 32 bytes version 32 bytes version not implemented 32 bytes version not implemented 32 bytes version 32 bytes version 32 bytes version 32 bytes version Acknowledge Byte D5h (halfduplex support) B5h (currently) D5h (halfduplex support) B5h 55h 55h A5h C5h (halfduplex support) C5h (halfduplex support) Activated via P0L.4 P0L.4 P0L.4 P0L.4 ALE + NMI# ALE + NMI# P0L.4 (+ NMI# due to a bug) P0L.4 P0L.4 Semiconductor Group 2 of 2 AP1613 03.97 |
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