參數(shù)資料
型號: TMS470R1A256PZ
廠商: Texas Instruments, Inc.
英文描述: 16/32-Bit RISC Flash Microcontroller
中文描述: 16/32位RISC閃存微控制器
文件頁數(shù): 27/46頁
文件大小: 392K
代理商: TMS470R1A256PZ
www.ti.com
RST and PORRST timings
timing requirements for PORRST
(see Figure 8)
V
CCP
/V
CCIO
V
CC
V
CC
V
CCP
/V
CCIO
10
8
6
5
3
7
6
9
V
CCPORH
V
CCIOPORL
V
IL(PORRST)
V
CCIOPORH
7
V
CCIOPORH
V
CCIOPORL
V
CCPORL
V
CC
11
PORRST
V
CCIO
V
CCPORH
V
CCPORL
V
IL
V
IL
V
IL
V
IL
V
IL(PORRST)
switching characteristics over recommended operating conditions for RST
(1)
TMS470R1A256
16/32-Bit RISC Flash Microcontroller
SPNS100–NOVEMBER 2004
NO.
MIN
MAX
0.6
UNIT
V
V
CCPORL
V
CC
low supply level when PORRST must be active during power up
V
high supply level when PORRST must remain active during power up
and become active during power down
V
CCIO
low supply level when PORRST must be active during power up
V
high supply level when PORRST must remain active during power
up and become active during power down
Low-level input voltage after V
CCIO
> V
CCIOPORH
Low-level input voltage of PORRST before V
CCIO
> V
CCIOPORL
Setup time, PORRST active before V
CCIO
> V
CCIOPORL
during power up
Setup time, V
CCIO
> V
CCIOPORL
before V
CC
> V
CCPORL
Hold time, PORRST active after V
CC
> V
CCPORH
Setup time, PORRST active before V
CC
V
CCPORH
during power down
Hold time, PORRST active after V
CC
> V
CCIOPORH
Hold time, PORRST active after V
CC
< V
CCPORL
Setup time, PORRST active before V
CC
V
CCIOPORH
during power down
Setup time, V
CC
< V
CCPORE
before V
CCIO
< V
CCIOPORL
V
CCPORH
1.5
V
V
CCIOPORL
1.1
V
V
CCIOPORH
2.75
V
V
IL
V
IL(PORRST)
t
su(PORRST)r
t
su(VCCIO)r
t
h(PORRST)r
t
su(PORRST)f
t
h(PORRST)rio
t
h(PORRST)d
t
su(PORRST)fio
t
su(VCCIO)f
0.2 V
CCIO
V
V
ms
ms
ms
ms
ms
ms
ms
ms
0.5
3
5
6
7
8
9
10
11
0
0
1
8
1
0
0
0
Figure 8. PORRST Timing Diagram
PARAMETER
MIN
MAX
UNIT
Valid time, RST active after PORRST inactive
Valid time, RST active (all others)
4112t
c(OSC)
8t
c(SYS)
t
v(RST)
ns
(1)
Specified values do NOT include rise/fall times. For rise and fall timings, see the "switching characteristics for output timings versus load
capacitance" table.
27
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