MDTIC MDT10P258

深圳市美芯微电子有限公司麦肯单片机授权一级代理商
MDT10P258
电话:0755-36857609/27945551/29491882
地址:深圳市宝安区宝源路名优产品采购中心B1区721室
2 oscillator start-up time can be selected
1. General Description
This ROM-Based 8-bit micro-controller uses a
by programming option:
fully static CMOS technology process to
EXT-R、RC:150 s,20ms
achieve high speed, small size, the low power
XT、LF
:20ms,80ms
8-bit real time clock/counter(RTCC) with
and high noise immunity.
On chip memory includes 2K words EPROM,
8-bit programmable prescaler
and 80 bytes static RAM.
On-chip RC oscillator based Watchdog
Timer(WDT)
2. Features
The followings are some of the features on the
12 I/O pins with their own independent
hardware and software :
direction control
Fully CMOS static design
12 I/O pins own independent weak
8-bit data bus
pull-high and can be enabled by software.
On chip EPROM size : 2 K words
WDT can be enabled by software if WDT
Internal RAM size : 80 bytes
Disable is selected in user option.
(73 general purpose registers, 7 special
registers)
3. Applications
36 single word instructions
The application areas of this MDT10P258 are
14-bit instructions
from appliance motor control and high speed
2-level stacks
automotive to low power remote transmitters
Operating voltage : 2.3 V ~ 5.5 V
/receivers, pointing devices, and
Operating frequency : 0 ~ 20 MHz
telecommunications processors. Such as
The most fast execution time is 200 ns
Remote controller, small instruments, chargers,
under 20 MHz in all single cycle
toy, automobile and PC peripheral … etc.
instructions except the branch instruction
Addressing modes include direct, indirect
and relative addressing modes
Power-on Reset (POR)
4 types of power edge-detector reset:
1.8v , 2.1v , always enable 1.8v and
Disable
Sleep Mode for power saving
4 types of oscillator can be selected by
programming option:
RC-Low cost RC oscillator
LFXT-Low frequency crystal oscillator
XTAL-Standard crystal oscillator
EXT-R-Low cost R oscillator
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.1
2010/09
Ver. 1.0
MDT10P258
4. Pin Assignment
MDT10P258P11
MDT10P258S11
PA2 1
18 PA1
PA3 2
17 PA0
RTCC 3
16 OSC1
/MCLR 4
15 OSC2
Vss 5
14 Vdd
PB0 6
13 PB7
PB1 7
12 PB6
PB2 8
11 PB5
PB3 9
10 PB4
MDT10P258SS11
PA2
PA3
RTCC
/MCLR
VSS
VSS
PB0
PB1
PB2
PB3
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
PA1
PA0
OSC1
OSC2
VDD
VDD
PB7
PB6
PB5
PB4
5. Order Information
ROM
RAM
(Words)
(Bytes)
MDT10P258P11
2K
73
12
MDT10P258S11
2K
73
MDT10P258SS11
2K
73
MARK
I/O
Timer
Package
Mil
1
18-DIP
300 mil
12
1
18-SOP
300 mil
12
1
20-SSOP
209 mil
(8 bit)
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.2
2010/09
Ver. 1.0
MDT10P258
6. Block Diagram
EPROM
Two Levels Stack
Port
PA0~PA3
4 bits
RAM
73X8
2048X14
Port A
11 bits
11 bits
Program Counter
(pull hi)
14
bits
Instruction
Register
Special Register
MCLR
OSC2
OSC1
Port
PB0~PB7
8 bits
D0~D7
Port B
(pull hi)
Oscillator Circuit
Instruction
Decoder
Control Circuit
Data
8-bit
Power on Reset
PED
Working Register
ALU
8-bit Timer/Counter
Prescaler
Status Register
WDT/OST
Timer
RTCC
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.3
2010/09
Ver. 1.0
MDT10P258
7. Pin Function Description
Pin Name
I/O
Function Description
PA0~PA3
I/O
Port A, TTL input level
PB0~PB7
I/O
Port B, TTL input level
RTCC
I
Real Time Clock/Counter, Schmitt Trigger input levels
/MCLR
I
Master Clear, Schmitt Trigger input levels
OSC1
I
Oscillator Input
OSC2
O
Oscillator Output
Vdd
Power supply
Vss
Ground
8. Memory Map
(A) Register Map
Address
Description
00
Indirect Addressing Register
01
RTCC
02
PC
03
STATUS
04
MSR
05
Port A
06
Port B
07~0F
Internal RAM
10~1F
Internal RAM, Memory bank 0
30~3F
Internal RAM, Memory bank 1
50~5F
Internal RAM, Memory bank 2
70~7F
Internal RAM, memory bank 3
(1) IAR ( Indirect Address Register) : R0
(2) RTCC (Real Time Counter/Counter Register) : R1
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mdtic.com.tw
http://www.mx mcu.com.cn
P.4
2010/09
Ver. 1.0
MDT10P258
(3) PC (Program Counter) : R2
Write PC, CALL --- always 0
JUMP, LJUMP, LCALL --- from instruction word
RTWI, RET --- from STACK
A10
A9
A8
A7~A0
Write PC, JUMP, CALL --- from STATUS b6 b5
RTWI, RET --- from STACK
LJUMP, LCALL – from instruction word
Write PC --- from ALU
JUMP, CALL, LJUMP, LCALL --- from instruction word
RTWI, RET --- from STACK
(4) STATUS (Status register) : R3
Bit
Symbol
Function
0
C
Carry bit
1
HC
Half Carry bit
2
Z
Zero bit
3
PF
Power loss Flag bit
4
TF
WDT Timer overflow Flag bit
PAGE
ROM page select bit :
6—5
00 : Page 0, 000H --- 1FFH
01 : Page 1, 200H --- 3FFH
10 : Page 2, 400H --- 5FFH
11 : Page 3, 600H --- 7FFH
7
——
General purpose bit
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.5
2010/09
Ver. 1.0
MDT10P258
(5) MSR (Memory Bank Select Register) : R4
Memory Bank Select Register :
00 : 10~1F
01 : 30~3F
10 : 50~5F
11 : 70~7F
b7
b6
b5
b4
b3
b2
b1
b0
Read only, always read as “1”
Indirect Addressing Mode
(6) PORT A : R5
PA3~PA0, I/O Register
(7) PORT B : R6
PB7~PB0, I/O Register
(8) TMR (Time Mode Register)
Bit
Symbol
Prescaler Value
2—0
PS2—0
3
PSC
4
TCE
5
TCS
6
PHEN
7
WDTEN
Function
RTCC rate
WDT rate
0 0 0
1:2
1:1
0 0 1
1:4
1:2
0 1 0
1:8
1:4
0 1 1
1 : 16
1:8
1 0 0
1 : 32
1 : 16
1 0 1
1 : 64
1 : 32
1 1 0
1 : 128
1 : 64
1 1 1
1 : 256
1 : 128
Prescaler assignment bit :
0 — RTCC
1 — Watchdog Timer
RTCC signal Edge :
0 — Increment on low-to-high transition on RTCC pin
1 — Increment on high-to-low transition on RTCC pin
RTCC signal set :
0 — Internal instruction cycle clock
1 — Transition on RTCC pin
Global Pull High Enable bit :
0 — Enable weak internal Pull High
1 — Disable weak internal Pull High
This bit will be ignored if the “I/O pull-hi” is disable in user
option.
Watchdog timer Enable bit :
0 — Enable WDT 1 — Disable WDT
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.6
2010/09
Ver. 1.0
MDT10P258
(9) CPIO A, CPIO B (Control Port I/O Mode Register)
The CPIO register is “write-only”
=“0”, I/O pin in output mode;
=“1”, I/O pin in input mode.
(10) Set Pull high resistors
The Pull high register is “write-only”
=“0”, Disable I/O pin Pull high resistor
=“1”, Enable I/O pin Pull high resistor
Do the CPIO instructions twice within three instructions on the same I/O port, then the second CPIO
instruction will set the corresponding pull-hi of I/O pins to enable if the PHEN bit is enable (PHEN=0).
Correct instruction sequence to enable pull-high
Ex1:
LDWI 0FFH
CPIO 06H
←First:set PortB to input
LDWI 0FFH
←Second
CPIO 06H
←Third:enable Pull high of PB0~7
Ex2:
LDWI 0FFH
CPIO 06H
CPIO 06H
←First:set PortB to input
←Second:enable Pull high of PB0~7
Incorrect instruction sequence to enable pull-high
Ex1: (over three instructions)
LDWI 0FFH
CPIO 06H
←First:set PortB to input
LDWI 0FFH
←Second
NOP
←Third
CPIO 06H
←Fourth:set PortB to input
Ex2:
LDWI
CPIO
CPIO
(Different port)
0FFH
06H
←First:set PortB to input
05H
←set PortA to input
(11) EPROM Option by writer programming :
OSC Type
Ext-R
XT
LF
RC
Description
Low cost external R oscillator
Crystal oscillator
Low frequency crystal oscillator
Low cost RC oscillator
OST
Description
150 us\ 20 ms OST= 150 us (for RC) or 20ms (for crystal)
20 ms\80 ms OST= 20 ms (for RC) or 80ms (for crystal)
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.7
2010/09
Ver. 1.0
MDT10P258
WDT
Disable
Enable
PED
Disable
Low level
Mid level
L(all on)
Security
Disable
Enable
Software WDT
Enable
Disable
Freq x 2
Enable
Disable
I/O pull-hi
Enable
Disable
CLKOUT
Enable
Disable
Reset on Err
Enable
Disable
Description
Watchdog timer disable all the time
(can be enabled by software,if software WDT enable)
Watchdog timer enable all the time
(always enable)
Description
PED disable
1.8V
2.1V
always Enable 1.8V
Description
Security Disable
Security Enable
Description
WDT can be enabled by software
WDT can’t be enabled by software
Description
System clock is doubled
System clock is the oscillation frequency
Description
Allow software to enable independent I/O pin
pull-high
Disable all pull-high resistors
Description
Allow OSC2 to output CLKOUT signal
OSC2 will be floating
Description
The MCU will be reset if two illegal instructions are
executed continuously.
Disable the illegal instruction reset function
(B) Program Memory
Address
000-7FF
7FF
Description
Program memory
The starting address of power on, external reset or WDT time-out reset.
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.8
2010/09
Ver. 1.0
MDT10P258
8. Reset Condition for all Registers
Register
Address
Power-On Reset
/MCLR or WDT Reset
CPIO A
--
1111 1111
1111 1111
CPIO B
--
1111 1111
1111 1111
TMR
--
1111 1111
1111 1111
IAR
00h
-
-
RTCC
01h
xxxx xxxx
uuuu uuuu
PC
02h
1111 1111
1111 1111
STATUS
03h
0001 1xxx
000# #uuu
MSR
04h
100x xxxx
100u uuuu
PORT A
05h
- - - - xxxx
- - - - uuuu
PORT B
06h
xxxx xxxx
uuuu uuuu
Note : u=unchanged, x=unknown, - =unimplemented, read as “0”
#=value depends on the condition of the following table
Condition
Status: bit 4
Status: bit 3
/MCLR reset (not during SLEEP)
u
u
/MCLR reset during SLEEP
1
0
WDT reset (not during SLEEP)
0
1
WDT reset during SLEEP
0
0
9. Instruction Set :
Instruction Code
Mnemonic
Operands
Function
Operating
Status
010000 00000000
NOP
No operation
None
010000 00000001
CLRWT
Clear Watchdog timer
0→WT
TF, PF
010000 00000010
SLEEP
Sleep mode
0→WT, stop OSC
TF, PF
010000 00000011
TMODE
Load W to TMODE register
W→TMODE
None
010000 00000100
RET
Return
Stack→PC
None
010000 00000rrr
CPIO R
Control I/O port register
W→CPIO r
None
010001 1rrrrrrr
STWR R
Store W to register
W→R
None
011000 trrrrrrr
LDR R, t
Load register
R→t
Z
111010 iiiiiiii
LDWI I
Load immediate to W
I→W
None
010111 trrrrrrr
SWAPR R, t
Swap halves register
None
011001 trrrrrrr
INCR R, t
Increment register
[R(0~3)
R(4~7)]→t
R + 1→t
Z
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.9
2010/09
Ver. 1.0
MDT10P258
Mnemonic
Operands
Instruction Code
Function
Operating
Status
011010 trrrrrrr
INCRSZ R, t
Increment register, skip if zero
R + 1→t
None
011011 trrrrrrr
ADDWR R, t
Add W and register
W + R→t
C, HC, Z
011100 trrrrrrr
SUBWR R, t
Subtract W from register
C, HC, Z
011101 trrrrrrr
DECR R, t
Decrement register
R ﹣W→t or
(R+/W+1→t)
R ﹣1→t
011110 trrrrrrr
DECRSZ R, t
Decrement register, skip if zero
R ﹣1→t
None
010010 trrrrrrr
ANDWR R, t
AND W and register
R ∩ W→t
Z
110100 iiiiiiii
ANDWI i
AND W and immediate
i ∩ W→W
Z
010011 trrrrrrr
IORWR R, t
Inclu. OR W and register
R ∪ W→t
Z
110101 iiiiiiii
IORWI i
Inclu. OR W and immediate
i ∪ W→W
Z
010100 trrrrrrr
XORWR R, t
Exclu. OR W and register
R ♁ W→t
Z
110110 iiiiiiii
XORWI i
Exclu. OR W and immediate
i ♁ W→W
Z
011111 trrrrrrr
COMR R, t
Complement register
/R→t
Z
010110 trrrrrrr
RRR
R, t
Rotate right register
C
010101 trrrrrrr
RLR
R, t
Rotate left register
C
010000 1xxxxxxx
CLRW
Clear working register
R(n) →R(n-1),
C→R(7), R(0)→C
R(n)→r(n+1),
C→R(0), R(7)→C
0→W
010001 0rrrrrrr
CLRR
Clear register
0→R
Z
0000bb brrrrrrr
BCR
R, b
Bit clear
0→R(b)
None
0010bb brrrrrrr
BSR
R, b
Bit set
1→R(b)
None
0001bb brrrrrrr
BTSC R, b
Bit Test, skip if clear
Skip if R(b)=0
None
0011bb brrrrrrr
BTSS R, b
Bit Test, skip if set
Skip if R(b)=1
None
1000nn nnnnnnnn
LCALL n
Long CALL subroutine
None
1010nn nnnnnnnn
LJUMP n
Long JUMP to address
n→PC,
PC+1→Stack
n→PC
110000 nnnnnnnn
CALL
n
Call subroutine
None
110001 iiiiiiii
RTWI
i
Return, place immediate to W
n→PC,
PC+1→Stack
Stack→PC,i→W
None
11001n nnnnnnnn
JUMP
n
JUMP to address
n→PC
None
R
Z
Z
None
Note :
W
WT
TMODE
CPIO
TF
PF
PC
OSC
Inclu.
Exclu.
AND
:
:
:
:
:
:
:
:
:
:
:
Working register
Watchdog timer
TMODE mode register
Control I/O port register
Timer overflow flag
Power loss flag
Program Counter
Oscillator
Inclusive ‘∪’
Exclusive ‘♁’
Logic AND ‘∩’
b
t
:
:
0
1
R
:
C
:
HC :
Z
:
/
:
x
:
i
:
n
:
Bit position
Target
: Working register
: General register
General register address
Carry flag
Half carry
Zero flag
Complement
Don’t care
Immediate data ( 8 bits )
Immediate address
10. Electrical Characteristics
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.10
2010/09
Ver. 1.0
MDT10P258
(Operating temperature at 25℃).
Sym
Description
Condition
Vdd Operating voltage
VIL
VIH
IIL
VOL
Typ
Max
Unit
2.3
6.0
V
Input Low Voltage
PA, PB
Vdd=5V
-0.6
1.0
V
RTCC, /MCLR
Vdd=5V
-0.6
1.0
V
PA, PB
Vdd=5V
2.0
Vdd
V
RTCC, /MCLR
Vdd=5V
3.3
Vdd
V
Input leakage current
Vdd=5V
+/-1
µA
Input high Voltage
Output Low Voltage
PA, PB
VOH
Min
Vdd=5V, IOL=20mA
0.5
V
Vdd=5V, IOL=5mA
0.2
V
Vdd=5V, IOH= -20mA
3.4
V
Vdd=5V, IOH= -5mA
4.5
V
0.1
Output High Voltage
PA, PB
Islp
Sleep current (WDT disable)
Vdd=2.3 ~ 6.0 V
Islp
Sleep current (WDT enable)
Vdd=2.3 V
1
A
Vdd=3.0 V
1.2
A
Vdd=4.0 V
3.0
A
Vdd=5.0 V
5.0
A
Vdd=6.0 V
10
A
Vpr
Power Edge-detector Reset Voltage
1.0
A
Low level
1.6
1.8
V
Mid level
1.9
2.1
V
Vdd=2.3 V
28.5
mS
Vdd=3.0 V
25.0
mS
Vdd=4.0 V
21.9
mS
Vdd=5.0 V
20.3
mS
Vdd=6.0 V
19.1
mS
TFLT /MCLR filter
Vdd=5.0 V
600
nS
Icc
Vdd=5.0v
15
A
Twdt The basic WDT time-out cycle time
Comparator Supply current (one
comparator)
Vref Input reference voltage
Vdd=2.5v ~6.0 V
Vdd-0.8
V
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.11
2010/09
Ver. 1.0
MDT10P258
11. Operating Current
Temperature=25 ℃, the typical value as followings :
11.1 OSC Type=RC ﹔WDT-Enable; @Vdd=5.0 V﹔ PED=Disable
Cext. (F)
3P
20P
100P
300P
Rext. (Ohm)
Frequency (Hz)
Current (A)
4.7 K
9.16 M
1.40mA
10.0 K
5.6 M
1.00mA
47.0 K
1.44 M
350 A
100.0 K
718.4 K
250 A
300.0 K
245.2 K
200 A
470.0 K
154.8 K
180 A
4.7 K
4.72 M
820µA
10.0 K
2.73 M
550 A
47.0 K
649.6 K
250 A
100.0 K
318.4 K
200 A
300.0 K
107.2 K
170 A
470.0 K
67.6 K
160 A
4.7 K
1.68 M
400 A
10.0 K
934 K
300 A
47.0 K
212.8 K
200 A
100.0 K
103.2 K
175 A
300.0 K
34.6 K
160 A
470.0 K
21.8 K
150 A
4.7 K
716 K
300 A
10.0 K
392.4 K
220 A
47.0 K
87.6 K
170 A
100.0 K
42.4 K
160 A
300.0 K
14.2 K
155 A
470.0 K
8.8 K
145 A
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.12
2010/09
Ver. 1.0
MDT10P258
11.2 OSC Type=LF (OSC1&OSC2 External Cap about 10P); WDT-Disable ; PED=Disable
Voltage/Frequency
32 K
455 K
(Ext 50P)
[email protected] A
1M
Sleep
40.0 A
<1.0 A
2.3 V
5.6 A
3.0 V
11.5 A
46.1 A
70.0 A
<1.0 A
4.0 V
28.7 A
91.3 A
124.5 A
<1.0 A
5.0 V
50.0 A
150 A
189.5 A
<1.0 A
6.0 V
135.0 A
225.0 A
260.0 A
<1.0 A
11.3 OSC Type=XT (OSC1&OSC2 External Cap about 10P); WDT-Enable ;PED=Disable
Voltage/Frequency
1M
4M
10 M
Sleep
280.0 A
<1.0 A
2.1 V
39.0 A
120.0 A
3.0 V
85.0 A
240.0 A
480.0 A
1.2 A
4.0 V
160.0 A
400.0 A
660.0 A
3.0 A
5.0 V
260.0 A
600.0 µA
1.1 mA
5.0 A
6.0 V
400.0 A
840.0 µA
1.5 mA
10.0 A
11.4 OSC Type=EXTR ; WDT-Enable; @ Vdd=5.0 V PED=Enable
Rext. (Ohm)
6.2 K
15.0 K
75.0 K
Frequency (Hz)
Current (A)
2.3V
6.56 M
1.7 m
3.0V
7.10M
1.8 m
4.0V
7.62M
2.8 m
5.0V
7.93 M
3.8 m
5.5V
8.02M
4.3 m
2.3V
3.62 M
750 u
3.0V
3.90M
1.1 m
4.0V
4.09M
1.7 m
5.0V
4.19 M
2.4 m
5.5V
4.22M
2.7 m
2.3V
965.7 K
220 u
3.0V
995.7 K
330 u
4.0V
1.01 M
600 u
5.0V
1.02 M
880 u
5.5V
1.02 M
1.1 m
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.13
2010/09
Ver. 1.0
MDT10P258
Rext. (Ohm)
180.0 K
510.0 K
1.1 M
2.4 M
Frequency (Hz)
Current (A)
2.3V
417.7 K
100 u
3.0V
424.9 K
185 u
4.0V
428.9 K
380 u
5.0V
431.3 K
640 u
5.5V
432.4 K
790 u
2.3V
154.2 K
45 u
3.0V
155.5 K
110 u
4.0V
156.3 K
280 u
5.0V
157 K
510 u
5.5V
157.3 K
640 u
2.3V
72.8 K
30 u
3.0V
73.2 K
90 u
4.0V
73.6 K
250 u
5.0V
73.9 K
480 u
5.5V
74 K
615 u
2.3V
33.4 K
20 u
3.0V
33.5 K
80 u
4.0V
33.7 K
240 u
5.0V
33.8 K
470 u
5.5V
33.9 K
600 u
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.14
2010/09
Ver. 1.0
MDT10P258
11.5 Power Edge-detector Reset Voltage (Not in Sleep Mode), @ Vdd=5.0 V (PED:Enable)
Vpr(Low level)≦1.6~1.8 V
Vpr ﹕Vdd (Power Supply)
Vpr(Mid level)≦1.9~2.1 V
12. Port A and Port B Equivalent Circuit
Control Pull-high
Pull high Resistor
D
C
K
I/O
Control
I/O Q
Contr
ol
Latch Q
B
Port I/O
Pin
D
Data
O/P
Latch Q
G
B
Write
Data
Bus
Rea
d
Q
D
B Data
I/P
G Latch
TTL Input
Level
Input
Resistor
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.15
2010/09
Ver. 1.0
MDT10P258
13. MCLRB and RTCC Input Equivalent Circuit
MCLRB
R≒1K
Schmitt Trigger
R≒1K
RTCC
Schmitt Trigger
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.16
2010/09
Ver. 1.0
MDT10P258
14. External Capacitor Selection For Crystal Oscillator
@ Vdd=5.0 V
Osc. Type
XT
LF
XT Oscillator Mode
Capacity Range
10 MHz
10 pF ~ 50 pF
4 MHz
10 pF ~ 50 pF
1 MHz
20 pF ~50 pF
1 MHz
20 pF ~ 30 pF
455 K
20 pF ~30 pF
32 K
20 pF ~30 pF
Ext-R Oscillator Mode
LF Oscillator Mode
MDT10P258
OSC1
Resonator Freq.
MDT10P258
OSC2
OSC1
OSC2
RC Oscillator Mode
MDT10P258
OSC1
OSC2
Fosc/4
C1
C2
The above values of the external capacitor are for reference only but the higher capacitance also increases the
start-up time.
This specification are subject to be changed without notice. Please visit our web-site for the latest information
http://www.mx mcu.com.cn
http://www.mdtic.com.tw
P.17
2010/09
Ver. 1.0