Page 383
TMP89FM42
RA002
25.5 Power-on Reset Circuit Characteristics
Figure 25-6 Power-on Reset Operation Timing
Note: Care must be taken in system designing since the power-on reset circuit may not fulfill its functions due to the fluc-
tuations in the power supply voltage (V
DD
).
Note 1: Because the power-on reset releasing voltage and the power-on reset detecting voltage change relative to one another,
the detected voltage will never become inverted.
Note 2: A clock output by an oscillating circuit is used as the input clock for a warming-up counter. Because the oscillation fre-
quency does not stabilize until an oscillating circuit stabilizes, some errors may be included in the warming-up time.
Note 3: Boost the power supply voltage such that t
VDD
becomes smaller that t
PWUP
.
(V
SS
=
0 V, Topr
=
−
40 to 85
°
C)
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
PROFF
Power-on reset releasing voltage
Note
1.85
2.02
2.19
V
V
PRON
Power-on reset detecting voltage
Note
1.75
1.85
1.95
t
PROFF
Power-on reset releasing response time
−
0.01
0.1
ms
t
PRON
Power-on reset detecting response time
−
0.01
0.1
t
PRW
Power-on reset minimum pulse width
1.0
−
−
t
PWUP
Warming-up time after a reset is cleared
−
102 x 2
9
/fc
−
s
t
VDD
Power supply rise time
−
−
5
ms
Power supply voltage (V
DD
)
V
PROFF
Operating voltage
V
PRON
t
VDD
t
PPW
t
PRON
Warm-up counter start
t
PWUP
t
PROFF
Power-on reset signal
CPU and peripheral circuit
reset signal
Warm-up counter clock
Summary of Contents for TLCS-870/C1 Series
Page 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Page 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Page 4: ......
Page 14: ......
Page 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Page 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Page 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Page 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Page 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Page 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Page 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Page 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Page 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Page 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Page 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Page 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Page 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Page 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Page 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Page 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Page 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Page 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Page 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Page 406: ...26 Package Dimensions TMP89FM42 ...
Page 408: ......