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PDF CTM8B54E Data sheet ( Hoja de datos )
| Número de pieza | CTM8B54E | |
| Descripción | (CTM8B54E - CTM8B57E) EPROM-Based 8-Bit COMS Microcontroller | |
| Fabricantes | Ceramate Technical | |
| Logotipo |  |
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CTM8B54E/55E/56E/57E
EPROM-Based 8-Bit CMOS Microcontroller
FEATURES
• Total of 33 single word instructions .
• The fast execution time may be 200ns for all single
cycle instructions under 20MHz operating.
• Operating voltage range: 2.3V ~ 6.5V
• 8-bit data bus.
• 14-bit instruction word.
• Four-level stacks.
• On chip EPROM size : 512x14 bits for CTM8B54E/55E,
1Kx14 bits for CTM8B56E,
2Kx14 bits for CTM8B57E.
• Internal RAM size : 25 bytes for CTM8B54E/56E,
24 bytes for CTM8B55E,
• 72 bytes for CTM8B57E.
• Direct and indirect addressing modes for data accessing
• 8-bit real time clock/counter with 8-bit programmable
prescaler.
• Internal power-on Reset.
• Device Reset Timer.
• Code protection.
• Sleep mode for power saving.
• On chip Watchdog Timer(WDT) based on internal RC
oscillator.
• Three I/O ports PA, PB nad PC with independent direc-
tion control.
• 4 types of oscillator can be selected by code options:
- RC : Low-cost RC oscillator
- XTAL : Standard crystal oscillator
- HFXTAL : High frequency crystal oscillator
- LFXTAL : Low frequency crystal oscillator
GENERAL DESCRIPTION
CTM8B5X series is an EPROM based 8-bit micro-
controller which employs a full CMOS technology
enhanced with low-cost, high speed and high noise
immunity. Watchdog Timer, RAM, EPROM, tri-state
I/O port, power down mode, and real time program-
mable clock/counter are integrated into this chip.
CTM8B5X contains 33 instructions, all are single
cycle except for program branches which take two
cycles.
On chip memory is available with 512x14 bits of
EPROM for CTM8B54E/55E, 1Kx14 bits of EPROM
for CTM8B56E, 2Kx14 bits of EPROM for
CTM8B57E and 24 to 72 bytes of static RAM.
BLOCK DIAGRAM
Vdd
Configuration
Vss Word
2OsSceMleoctde
OSCI
OSCO
MCLR
Sleep
Oscillator
Circuit
Four-level
Stack
WatchDog
Timer
11
T0CKI
WDT/Timer0
Prescaler
6
T0MODE
Register
6
Accumulator
WDT
Time Out
Timer0
RAM
24, 25 or 27 Bytes
FSR
8
Program
Counter
11
EPROM
512 X 14 TO
2048 X 14
14
Instruction
Register
14
Instruction
Decoder
PortA
PortB
4
PA3:PA0
8 PB7:PB0
Status
ALU
PortC
8 PC7:PC0
Only in CTM8B55E/57E
8
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C
Email: [email protected]
Tel:886-3-3529445
Fax:886 -3 -3521052
Page 1 of 23
Http: www.ceramate.com.tw
Rev 1.1 Dec 26,2001
1 page  
CTM8B54E/55E/56E/57E
EPROM-Based 8-Bit CMOS Microcontroller
3.1.5 FSR(File select register pointer): R4
Bit 0~4 are used to select up to 32 registers (address: 00h~1Fh) and Bit 5~6 are Bank Select (Bank0~3) in the
indirect addressing mode shown in Figure 2.
3.1.6 PORT A: R5
PA3:PA0, bi-directional I/O Register
3.1.7 PORT B: R6
PB7:PB0, bi-directional I/O Register
3.1.8 PORT C: R7
PB7:PB0, bi-directional I/O Register, and for MTU8B55E/57E only
3.1.9 T0MODE REGISTER: T0MODE is a write-only register and the content is listed in Table 2.
3.1.10 IOST (Control Port I/O Mode Register)
The IOST register is “write-only”
= 0, I/O pin in output mode;
= 1, I/O pin in input mode.
Bank Select
Indirect Addressing Mode
Location Select
B7 B6 B5 B4 B3 B2 B1 B0
Read 1
70h Bank 3
50h Bank 2
30h Bank 1
Bank 0
10h
7Fh
5Fh
3Fh
16 Bytes
SRAM
1Fh
FIGURE 2. Data Memory Configuraion
00h INAR
01h Timer0
02h PC
03h STATUS
04h FSR
05h PORT A
06h PORT B
07h PORT C
08h 8 Bytes
0Fh SRAM
Bank 0
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C
Tel:886-3-3529445
Fax:886 -3 -3521052
Page 5 of 23
Email: [email protected]
Http: www.ceramate.com.tw
Rev 1.1 Dec 26,2001
5 Page 
CTM8B54E/55E/56E/57E
EPROM-Based 8-Bit CMOS Microcontroller
3.6 OSCILLATOR CONFIGURATION
This device supports four oscillator modes. Users can program two configuration bits to select the appropriate
mode. These oscillator modes offered as:
• RC: Low-cost crystal
• XTAL: Standard crystal oscillator
• HFXTAL: High frequency crystal oscillator
• LFXTAL: Low frequency crystal oscillator
3.6.1 XTAL, HFXTAL or LFXTAL modes
CTM8B54E/55E/56E/57E
Internal
Circuit
SLEEP
CTM8B54E/55E/56E/57E
OSCI
RF
XTAL
OSCO
RS
C1 C2
OSCI
OSCO
Open
Clock from
external system
(a) Crystal Operation (or Ceramic Resonator)
3.6.2 RC Oscillator Mode
(b) External Clock Input Operation
R
OSCI
C
CTM8B54E/55E/56E/57E
internal
clock
OSCO
0÷4
3.7 CONFIGURATION WORD
Bit 3
Bit2
Bit1
Bit0
Code Protect WDT Enable Oscillator Type Oscillator Type
Function
1x
x
x EPROM unprotected
0x
x
x EPROM protected
x1
x
x Watchdog Timer enable
x0
x
x Watchdog Timer disable
xx
1
1 RC
xx
1
0 HFXTAL
xx
0
1 XTAL
xx
0
0 LFXTAL
Remark
Default
Default
Default
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN, R.O.C
Tel:886-3-3529445
Fax:886 -3 -3521052
Page 11 of 23
Email: [email protected]
Http: www.ceramate.com.tw
Rev 1.1 Dec 26,2001
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet CTM8B54E.PDF ] | |
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