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UM0434 Datasheet(PDF) 261 Page - STMicroelectronics

Part # UM0434
Description  The primary objective of this user?셲 manual is to describe
PDF  390 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0434 Datasheet(HTML) 261 Page - STMicroelectronics

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External core complex interfaces
UM0434
262/391
j_update_ir
O
Update IR. Indicates the TAP controller is in the Update_IR state.
State
Meaning
Asserted—The TAP controller is in Update_IR state.
Negated—The TAP controller is not in Update_IR state.
j_capture_dr
O
Capture DR. Indicates whether the TAP controller is in the Capture_DR state.
State
Meaning
Asserted—The TAP controller is in Capture_DR state.
Negated—The TAP controller is not in Capture_DR state.
j_shift_dr
O
Shift DR. Indicates whether the TAP controller is in the Shift_DR state.
State
Meaning
Asserted—The TAP controller is in Shift_DR state.
Negated—The TAP controller is not in Shift_DR state.
j_update_gp_reg
O
Update DR. Indicates whether the TAP controller is in the Update_DR state.
State
Meaning
Asserted—The TAP controller is in the Update_DR state, and OCMD[R/W] is
low (write command).
j_gp_regsel[0:11] should be monitored to see which
register, if any, needs updating.
Negated—The TAP controller is not in the Update_DR state.
j_gp_regsel
O
Register select. Decoded from the OCMD[RS]. They are used to specify which external
general-purpose JTAG register to access using the core TAP controller.
Signal Name
Type
RS
j_gp_regsel[0]
O
0x70
j_gp_regsel[1]
O
0x71
j_gp_regsel[2]
O
0x72
j_gp_regsel[3]
O
0x73
j_gp_regsel[4]
O
0x74
j_gp_regsel[5]
O
0x75
j_gp_regsel[6]
O
0x76
j_gp_regsel[7]
O
0x77
j_gp_regsel[8]
O
0x78
j_gp_regsel[9]
O
0x79
j_gp_regsel[10]
O
0x7A
j_gp_regsel[11]
O
0x7B
j_en_once_regsel
O
Enable once register select. This control signal can be used by external security logic to
help control
jd_enable_once. The external enable_OnCE register should be muxed onto
the
j_serial_data input. During the Shift_DR state, j_serial_data is supplied to j_tdo.
State
Meaning
Asserted—A decode of OCMD[RS] indicates an external enable_OnCE
register is selected (0b1111110 encoding) for access using the core TAP
controller.
j_nexus_regsel
O
External Nexus register select.
State
Meaning
Asserted—A decode of OCMD[RS] indicates an external Nexus register is
selected (0b1111100 encoding) for access using the core TAP controller.
Negated—No Nexus register is selected.
j_lsrl_regsel
O
LSRL register select.
State
Meaning
Asserted—A decode of OCMD[RS] indicates an external LSRL register is
selected (0b1111101 encoding) for access using the core TAP controller.
Table 186.
Descriptions of JTAG interface signals (continued)
Signal
I/O
Signal description



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