参数资料
型号: PowerPC 750CX
厂商: IBM Microeletronics
英文描述: 32-Bit Reduced Instruction Set Computer (RISC) Microprocessors(32位精简指令集微处理器)
中文描述: 32位精简指令集计算机(RISC)微处理器(32位精简指令集微处理器)
文件页数: 16/44页
文件大小: 562K
代理商: POWERPC 750CX
PowerPC 750CX RISC Microprocessor Datasheet
Page 16
Version 1.1
November 13, 2000
5.3
60X Bus Input AC Specifications
Table 7 provides the 60X bus input AC timing specifications for the PowerPC 750CX as defined in Figure 3 and
Figure 4.
Figure 3 provides the input timing diagram for the PowerPC 750CX.
Table 7: 60X Bus Input Timing Specifications
1,6,8
See Table 2 on page 12 for operating conditions.
Num
Characteristic
1.8V Mode
2.5V Mode
Unit
Notes
Min
Max.
Min.
Max.
10a
Address/Data/Transfer attribute inputs valid to SYSCLK (input
setup)
1.4
1.4
ns
2
10b
All other inputs valid to SYSCLK (input setup)
1.4
1.4
ns
3
10c
Mode select input setup to HRESET (QACK)
8
8
t
sysclk
4,5,7
10d
TS to SYSCLK (input setup)
1.6
1.6
10e
DBWO to SYSCLK (input setup)
2.1
2.1
11a
SYSCLK to inputs invalid (input hold)
1.2
1.2
ns
2
11b
HRESET to mode select input hold (QACK)
0
0
ns
4,7
Note:
1. Input specifications are measured from the midpoint voltage (0.9V) of the signal in question to the midpoint voltage of the rising edge of the input
SYSCLK. Input and output timings are measured at the pin (see Figure 3).
2. Address/Data Transfer Attribute inputs are composed of all bidirectional and input signals except those listed in Note 3.
3. All other signal inputs are composed of the following: TA, QACK, and ARTRY.
4. The setup and hold time is with respect to the rising edge of HRESET (see Figure 4 on page 17).
5. t
, is the period of the external clock (SYSCLK) in nanoseconds (ns). The numbers given in the table must be multiplied by the period of SYSCLK
to compute the actual time duration (in ns) of the parameter in question.
6. These values are guaranteed by design, and are not tested.
7. This specification is for configuration mode select only. Also note that the HRESET must be held asserted for a
minimum of 255 bus clocks
after the
PLL relock time during the power-on reset sequence.
8. These timings are valid for processor frequencies up to 466MHz. 500MHz timing behavior and characterization is being evaluated at this time.
Figure 3. Input Timing Diagram
VM
SYSCLK
ALL INPUTS
VM = Midpoint Voltage (0.8V for SYSCLK, 0.9V for all other I/O)
10b
10d
10e
10a
11a
VM
VM
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