参数资料
型号: ACT-7000ASC-300F17I
元件分类: 微控制器/微处理器
英文描述: 64-BIT, 300 MHz, RISC PROCESSOR, CQFP208
封装: 1.120 X 1.120 INCH, CERAMIC, QFP-208
文件页数: 8/26页
文件大小: 231K
代理商: ACT-7000ASC-300F17I
16
SCD7000A Rev C 9/9/09
Aeroflex Plainview
JTAG Interface
The ACT 7000ASC interface supports JTAG boundary scan in conformance with IEEE 1149.1. The JTAG interface is
especially helpful for checking the integrity of the processor’s pin connections.
Boot-Time Options
Fundamental operational modes for the processor are initialized by the boot-time mode control interface. The boot-time
mode control interface is a serial interface operating at a very low frequency (SysClock divided by 256). The low
frequency operation allows the initialization information to be kept in a low cost EPROM; alternatively the twenty or so
bits could be generated by the system interface ASIC.
Immediately after the VccOK signal is asserted, the processor reads a serial bit stream of 256 bits to initialize all the
fundamental operational modes. ModeClock runs continuously from the assertion of VccOK.
Boot-Time Modes
The boot-time serial mode stream is defined in Table 16. Bit 0 is the bit presented to the processor when VccOK is
deasserted; bit 255 is the last.
Table 11 – Cause Register
31
30
29,28
27
26
25
24
23..8
7
6..2
0,1
BD
0
CE
0
W2
W1
IV
IP[15..0]
0
EXC
0
Table 12 – Interupt Control Register
31..16
15..8
7
6..5
4..00
0
IM[15..8]
TE
0
Spacing
Table 13 – IPLLO Register
31..28
27..24
23..20
19..16
15..12
11..8
7..4
3..0
IPL7
IIPL6
IPL5
IPL4
IPL3
IPL2
IPL1
IPL0
Table 14 – IPLHI Register
31..28
27..24
23..20
19..16
15..12
11..8
7..4
3..0
0
IPL13
IPL12
IPL11
IPL10
IPL9
IPL8
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