參數(shù)資料
型號: Alpha 21164
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: Alpha Microprocessor(64位微處理器)
中文描述: 阿爾法微處理器(64位微處理器)
文件頁數(shù): 47/115頁
文件大?。?/td> 846K
代理商: ALPHA 21164
21164 Microprocessor Functional Overview
47
Test Modes
The 21164 test interface port consists of 13 dedicated signals. Table 9 summarizes
the 21164 test port signals and their function.
5.5.1 Normal Test Interface Mode
The test port is in the default or normal test interface mode when the
port_mode_h<1:0>
signals are tied to 00. In this mode, the test port supports the
following:
Serial ROM interface port
Serial diagnostic terminal interface port
IEEE 1149.1 test access port
5.5.2 Serial ROM Interface Port
The following signals make up the serial ROM (SROM) interface:
srom_present_l
srom_data_h
Table 9 21164 Test Port Pins
Pin Name
Type Function
port_mode_h<1>
I
Must be false.
port_mode_h<0>
I
Must be false.
srom_present_l
I
Tied low if serial ROMs (SROMs) are present in system.
srom_data_h/Rx
I
Receives SROM or serial terminal data.
srom_clk_h/Tx
O
Supplies clock to SROMs or transmits serial terminal data.
srom_oe_l
O
SROM enable.
tdi_h
I
IEEE 1149.1 TDI port.
tdo_h
O
IEEE 1149.1 TDO port.
tms_h
I
IEEE 1149.1 TMS port.
tck_h
I
IEEE 1149.1 TCK port.
trst_l
I
IEEE 1149.1 optional TRST port.
test_status_h<0>
O
Indicates Icache BiSt status.
test_status_h<1>
O
Outputs an IPR-written value and timeout reset.
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