
7. JTAG Boundary Scan
175
Tsi310 User Manual
80B6020_MA001_05
•
Output-only pins: For device outputs that are not shared with component test functions, the
boundary scan cell IBM1149_BSR_BIDIOUT is used. Outputs that are shared with
component test inputs use the IBM1149_BSR_OUT boundary scan cell. Those that are
shared with component test outputs use the IBM1149_BSR_TESTOUT boundary scan cell.
The BSDL function label of OUTPUT2 is used for two-state outputs, OUTPUT3 is used for
three-state outputs.
•
Bidirectional pins: For bidirectional device pins that are not shared with component test
outputs, the boundary scan cell IBM1149_BSR_BIDI is used. Bidirectional pins that are
shared with component test inputs use the IBM1149_BSR_BIDI_SIO boundary scan cell.
Those that are shared with component test outputs use the IBM1149_BSR_BIDITESTOUT
boundary scan cell. All have the BSDL function label of BIDIR.
•
Control Functions: Two different boundary scan cells are used to control the device’s driver
enables, these are IBM1149_BSR_ENAB and IBM1149_BSR_FASTENAB. While they
perform the same boundary scan function, they differ in that the
IBM1149_BSR_FASTENAB cell has a faster functional path through it. It is often used on
timing-critical signals. Both have the BSDL function label of CONTROL.
7.7.1
Boundary Scan Register Bit Map
gives the mapping between the bit position in the boundary scan register and the signal
or control function that it represents. The index is ordered from JTG_TDO to JTG_TDI. The
value on JTG_TDI is applied on the rising edge of JTG_TCK, and JTG_TDO is valid on the
falling edge of JTG_TCK. The JTG_TDO driver is enabled by the TAP controller, all other
tristate drivers are controlled by the boundary scan register control cells listed in the following
table, and by the HIGHZ instruction code.
Table 22: Boundary Scan Register Bit Map
Bit
Position
Cell Type
Port Name
Function
Tristate
Control
Cell
1
IBM1149_BSR_BIDI
P_AD(0)
BIDIR
209
2
IBM1149_BSR_BIDI
P_AD(1)
BIDIR
210
3
IBM1149_BSR_BIDI
P_AD(2)
BIDIR
211
4
IBM1149_BSR_BIDI
P_AD(3)
BIDIR
212
5
IBM1149_BSR_BIDI
P_AD(4)
BIDIR
213
6
IBM1149_BSR_BIDI
P_AD(5)
BIDIR
214
7
IBM1149_BSR_BIDI
P_AD(6)
BIDIR
215
8
IBM1149_BSR_BIDI
P_AD(7)
BIDIR
216
9
IBM1149_BSR_BIDI
P_AD(8)
BIDIR
217
Summary of Contents for Tsi310TM
Page 8: ...Contents 8 Tsi310 User Manual 80B6020_MA001_05...
Page 10: ...List of Figures 10 Tsi310 User Manual 80B6020_MA001_05...
Page 12: ...List of Tables 12 Tsi310 User Manual 80B6020_MA001_05...
Page 18: ...18 Tsi310 User Manual 80B6020_MA001_05...
Page 44: ...2 Bus Operation 44 Tsi310 User Manual 80B6020_MA001_05...
Page 58: ...3 Clocking and Reset Options 58 Tsi310 User Manual 80B6020_MA001_05...
Page 62: ...4 Transaction Ordering 62 Tsi310 User Manual 80B6020_MA001_05...
Page 150: ...5 Configuration Registers 150 Tsi310 User Manual 80B6020_MA001_05...
Page 170: ...6 Signals and Pinout 170 Tsi310 User Manual 80B6020_MA001_05...
Page 190: ...7 JTAG Boundary Scan 190 Tsi310 User Manual 80B6020_MA001_05...
Page 196: ...8 Electrical Characteristics 196 Tsi310 User Manual 80B6020_MA001_05...
Page 200: ...9 Package Information 200 Tsi310 User Manual 80B6020_MA001_05...
Page 202: ...A Ordering Information 202 Tsi310 User Manual 80B6020_MA001_05...
Page 206: ...Index 206 Tsi310 User Manual 80B6020_MA001_05...