Cpu And Peripheral Logic Circuits - Epson TM-H6000 Service Manual

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CPU and Peripheral Logic Circuits

CPU
TableD-6 CPU specifications
Item
External Data Bus Width
Internal Data Bus Width
External Clock
(root oscillation)
Bus Speed
Product Number
Internal RAM
A/D Input Ports
D/A Output Port
CPU Terminals and Functions
TableD-7 CPU terminals and functions
Port (Terminal)
Name
DAREFH
DAREFL
DAOUT0
DAOUT1
DVCC
PC0
PC1
PD0
PD1
PD2
PD4
PD5
PD6
DVSS
PE0
Appendix D-46 Product Overview
Specification
16 bits
32 bits
9.83 MHz
19.66 MHz
TMP94C251F (Toshiba)
256 bytes (used as stack area)
8
Four slip sensors (TOF detector, BOF detector, ejection detector, validation
detector), and one each for MICR head reading, power source voltage
monitoring, impact head thermistor voltage, and thermal head thermistor voltage
Thermal paper feed motor and carriage motor reference voltage
Pin Description
No.
1 VCC
2 GND
3 For thermal PF, current setting
4 For impact CR, current setting
5 VCC
6 Paper roll near end (common
for HB/U175)
7 Paper end (roll paper)
8 Thermal PF_PHASE1
9 Thermal PF_PHASE2
10 Thermal PF_I01
11 Thermal PF_I02
12 Thermal PF_I11
13 Thermal PF_I12
14 GND
15 DSW2-5
Circuit Signal I/O
Name
THPF_DA OUT
OUT
CR_DA
ROL_NE IN
ROL_RE IN
THPF_PH1 OUT
THPF_PH2 OUT
THPF_I01 OUT
THPF_I02 OUT
THPF_I11 OUT
THPF_I12 OUT
DSW2-5 IN
I/O Definition
H L
 
 
5/256 0/256
5/256 0/256
Paper No paper
detected
No paper Paper detected
OFF ON
Rev. A