参数资料
型号: 1215E
英文描述: TEST/JTAG SUPPORT|CMOS|QFP|48PIN|PLASTIC
中文描述: 测试/ JTAG支持|的CMOS | QFP封装| 48PIN |塑料
文件页数: 39/92页
文件大小: 1041K
代理商: 1215E
44
Agere Systems Inc.
User Manual
April 2001
Advanced Operational Mode
497AE and 1215E Boundary-Scan Master 2
Appendix B—BSM2 Register Descriptions (continued)
CUTO: Control-USEROUT0/TAP Function/Output Enable Register
Purpose
Provides means by which a selected/attached B-S chain can be operated in TAP Manual Mode. (TAP Manual
Mode is entered by writing a 1 to the MAN bit of the CUTI register.) Provides means of control for the TRST* and
USEROUT0 pins (1215E only). Provides means of overriding enabling/disabling of TDO output pin.
Address (Octal)
02
Format
Default (Binary)
CUTO = 000000000
t0000000, where t is the value on the TDI pin. If the BSM2 is not in TAP Manual Mode, then the
values of the TDOM, TMSM, and TDOEM bits have no effect, although such values will have significance when the
TAP Manual Mode is selected.
Read-only Bits
CUTO[7] is read-only.
Description
TDIM
(TDI Manual Mode Bit)—In TAP Manual Mode, the value read from this bit is the last value of the TDI
signal received by the BSM2. The TDI signal is not latched, but feeds the TDIM bit directly. The value
is captured when a read of the CUTO register occurs according to the section titled Control of TDI,
TDO, TMS, and TRST* pins.
USR0
(USEROUT0 Control Bit)—The value of USR0 feeds the OR tree that drives USEROUT0 in the
1215E. When the value of the USR0 bit is 1, the BSM2 USEROUT0 pin will take the value of 1. When
the value of this bit is 0, the value of USEROUT0 pin is 0 unless one or more of the inputs to the OR
tree is driving the value 1. When USR0 is 0, the value of USEROUT0 may be interpreted as an inter-
rupt (active when equal to 1) accessible by a controller (e.g., a DMA controller) other than the control-
ling processor. The USR1 bit has no effect in the 497AE.
TRSTB
(TAP Reset Control Bit)—When the value of this bit is 1, all TAP Controllers in a selected/attached
B-S chain will be reset. The internal TAP State Tracker is also reset. The use of this bit is not
restricted to TAP Manual Mode. This bit may be used judiciously to halt execution of a scan operation.
15—08
07
06050403
0201
00
unused
TDIM
unused
USR0
TRSTB
TOEB
TDOM
TMSM
TDOEM
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