参数资料
型号: ST10R172LT6
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 16-BIT, 50 MHz, MICROCONTROLLER, PQFP100
封装: 14 X 14 MM, TQFP-100
文件页数: 60/68页
文件大小: 657K
代理商: ST10R172LT6
63/68
ST10R172L - ELECTRICAL CHARACTERISTICS
15.3.7 External Hardware Reset
VDD = 3.3 V ± 0.3 V
VSS = 0 V
TA = -40°C to +85 °C CL = 50 pF
Parameter
Symbol
Max. CPU Clock
= 50 MHz
Variable CPU Clock
1/2TCL = 1 to 50 MHz
Un
it
min.
max.
min.
max.
Sync. RSTIN low time1)
1) On power-up reset, the RSTIN pin must be asserted until a stable clock signal is available
(about 10...50 ms to allow the on-chip oscillator to stabilize) and until System Start-up Con-
figuration is correct on PORT0 (about 50
s for internal pullup devices to load 50 pF from
VILmin to VIHmin).
t70
SR
50
–4 TCL + 10
ns
RSTIN low to internal
reset sequence start
t71
CC
416
4
16
TCL
internal reset sequence,
(RSTIN internally pulled
low)
t72
CC
1024
TCL
RSTIN rising edge to inter-
nal reset condition end
t73
CC
4
6
46TCL
PORT0 system start-up
configuration setup to
RSTIN rising edge 2))
2) The value of bits 0 (EMU), 1 (ADAPT), 13 to 15 (Clock Configuration) are loaded during
hardware reset as long as internal reset signal is active, and have an immediate effect on
the system.
t74
SR
100
100
ns
PORT0 system start-up
configuration hold after
RSTIN rising edge
t75
SR
1
6
16TCL
Bus signals drive from
internal reset end
t76
CC
0
20
0
20
ns
RSTIN low to signals
release
t77
CC
50
50
ns
ALE rising edge from inter-
nal reset condition end
t78
CC
8
88TCL
Async. RSTIN low time1
t79
SR
1500
1500
ns
Table 18 External hardware reset
1
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