ARM7TDMI Technical Reference Manual(Rev 3)
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7.21. Output enable and disable times

Figure 7.20 shows the output enable and disable times due to a HIGHZ TAP instruction. Figure 7.21 shows the output enable and disable times due to data scanning.The timing parameters used in Figure 7.20 and Figure 7.21 are listed in Table 7.20.

Figure 7.20. Output enable and disable times due to HIGHZ TAP instruction

Note

Figure 7.20 shows the Tbse, output enable time, parameter and Tbsz, output disable time, when the HIGHZ TAP instruction is loaded into the instruction register.

Figure 7.21. Output enable and disable times due to data scanning

Note

Figure 7.21 shows the Tbse, output enable time, parameter and Tbsz, output disable time when data scanning, due to different logic levels being scanned through the scan cells for ABE and DBE.

Table 7.20. Output enable and disable timing parameters

SymbolParameterParameter type
TbseOutput enable timeMaximum
TbszOutput disable timeMaximum
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