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参数资料
| 型号： | TMS470R1VF346BPZQ |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, FLASH, 48 MHz, RISC MICROCONTROLLER, PQFP100 |
| 封装： | PLASTIC, LQFP-100 |
| 文件页数： | 25/56页 |
| 文件大小： | 779K |
| 代理商： | TMS470R1VF346BPZQ |
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TMS470R1VF336A, TMS470R1VF346A
16/32-BIT RISC FLASH MICROCONTROLLERS
SPNS079I – OCTOBER 2002 – REVISED SEPTEMBER 2006
31
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251-1443
RST and PORRST timings
When the VCC timing requirements for PORRST are satisfied, there are no timing requirements for VCCP.
Figure 7. PORRST Timing Diagram
switching characteristics over recommended operating conditions for RST
Specified values do NOT include rise/fall times. For rise and fall timings, see the switching characteristics for output timings versus load
capacitance table.
NO.
MIN
MAX
UNIT
VCCPORL
VCC low supply level when PORRST must be active during power up
0.6
V
VCCPORH
VCC high supply level when PORRST must remain active during power up and
become active during power down
1.5
V
VCCIOPORL
VCCIO low supply level when PORRST must be active during power up
1.1
V
VCCIOPORH
VCCIO high supply level when PORRST must remain active during power up and
become active during power down
2.75
V
VIL
Low-level input voltage after VCCIO > VCCIOPORH
0.2 VCCIO
V
VIL(PORRST)
Low-level input voltage of PORRST before VCCIO > VCCIOPORL
0.5
V
3
tsu(PORRST)r
Setup time, PORRST active before VCCIO > VCCIOPORL during power up
0
ms
5
tsu(VCCIO)r
Setup time, VCCIO > VCCIOPORL before VCC > VCCPORL
0
ms
6
th(PORRST)r
Hold time, PORRST active after VCC > VCCPORH
1
ms
7
tsu(PORRST)f
Setup time, PORRST active before VCC ≤ VCCPORH during power down
8
μs
8
th(PORRST)rio
Hold time, PORRST active after VCC > VCCIOPORH
1
ms
9
th(PORRST)d
Hold time, PORRST active after VCC < VCCPORL
0
ms
10
tsu(PORRST)fio
Setup time, PORRST active before VCC ≤ VCCIOPORH during power down
0
ns
11
tsu(VCCIO)f
Setup time, VCC < VCCPORL before VCCIO < VCCIOPORL
0
ns
PARAMETER
MIN
MAX
UNIT
tv(RST)
Valid time, RST active after PORRST inactive
4112tc(OSC)
ns
Valid time, RST active (all others)
8tc(SYS)
tfsu
Flash start up time, from RST inactive to fetch of first instruction from flash
(flash pump stabilization time)
336tc(OSC)
ns
VCCP/VCCIO
VCC
VCCP/VCCIO
10
8
6
5
3
7
6
9
VCCPORH
VCCIOPORL
VIL(PORRST)
VCCIOPORH
7
VCCIOPORH
VCCIOPORL
VCCPORL
VCC
11
PORRST
VCCIO
VCCPORH
VCCPORL
VIL
VIL(PORRST)
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