Sharp XE-A21S User Manual

SERVICE MANUAL

CODE : 00ZXEA21SUSME

LEAD-FREE SOLDER MODEL

ELECTRONIC

CASH REGISTER

MODEL XE-A21S

CONTENTS

■ LEAD-FREE SOLDER

CHAPTER 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

CHAPTER 2. OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CHAPTER 3. MASTER RESET AND PROGRAM RESET. . . . . . . . . 5

CHAPTER 4. HARDWARE DESCRIPTION . . . . . . . . . . . . . . . . . . . . 6

CHAPTER 5. TEST FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

CHAPTER 6. CIRCUIT DIAGRAM AND PWB LAYOUT . . . . . . . . . 15

Parts marked with "!" are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the safety and performance of the set.

			This document has been published to be used
SHARP CORPORATION			for after sales service only.
			The contents are subject to change without notice.

■ LEAD-FREE SOLDER

The PWB’s of this model employs lead-free solder. The “LF” marks indicated on the PWB’s and the Service Manual mean “Lead-Free” solder. The alphabet following the “LF” mark shows the kind of lead-free solder.

Example:

					Solder composition
					code (Refer to the
	Lead-Free				table at the right.)

					a
5mm

<Solder composition code of lead-free solder>

	Solder composition			Solder composition code
	Sn-Ag-Cu			a
	Sn-Ag-Bi			b
	Sn-Ag-Bi-Cu
	Sn-Zn-Bi			z
	Sn-In-Ag-Bi			i
	Sn-Cu-Ni			n
	Sn-Ag-Sb			s
	Bi-Sn-Ag-P			p
	Bi-Sn-Ag

(1) NOTE FOR THE USE OF LEAD-FREE SOLDER THREAD

When repairing a lead-free solder PWB, use lead-free solder thread. Never use conventional lead solder thread, which may cause a breakdown or an accident.

Since the melting point of lead-free solder thread is about 40°C higher than that of conventional lead solder thread, the use of the exclusive-use soldering iron is recommendable.

(2) NOTE FOR SOLDERING WORK

Since the melting point of lead-free solder is about 220°C, which is about 40°C higher than that of conventional lead solder, and its soldering capacity is inferior to conventional one, it is apt to keep the soldering iron in contact with the PWB for longer time. This may cause land separation or may exceed the heat-resistive temperature of components. Use enough care to separate the soldering iron from the PWB when completion of soldering is confirmed.

Since lead-free solder includes a greater quantity of tin, the iron tip may corrode easily. Turn ON/OFF the soldering iron power frequently.

If different-kind solder remains on the soldering iron tip, it is melted together with lead-free solder. To avoid this, clean the soldering iron tip after completion of soldering work.

If the soldering iron tip is discolored black during soldering work, clean and file the tip with steel wool or a fine filer.

XE-A21S LEAD-FREE SOLDER

CHAPTER 1. SPECIFICATIONS

1. APPEARANCE

Frontt view		Rear view
	Customer display
		-up
Operator display	(Pop-up type)
Printer cover
Receipt paper
Keyboard		Power cord
		Mode switch
Drawer
Drawer lock	SD card slot	USB port

Printer

Take--upup spool

Paper roll cradle

Print roller arm

Paper positioning guides

Print roller release lever

Inner cover

Accessories	Manager key	2
	Operator key	2
	Drawer lock key	2	Drawer lock key
	Paper roll	1	Wide 58mm 80φ
	Take-up spool	1
	USB cable	1	For connection between
	(0GS5422580) *1		ECR and PC
	Customer	1 disk	CD-ROM
	support tool
	Quick Start Guide	1 copy
	Instruction manual	1 copy	2 languages
			(English/Spanish)

Specifications and appearance subject to change without notice for improvement.

*1 Use only the USB cable (manufactured by SHARP) supplied with the XE-A21S for the connection with a PC.

In case you need a new USB cable, order the USB cable manufactured by SHARP Co. Ltd. (Part code: 0GS5422580) for use with the XE-A21S.

2. RATING

	Model	XE-A21S
	Dimensions	13.8 (W) × 16.9 (D) × 11.1 (H) in.
		(350 (W) ×	430 (D)		× 281 (H) mm)
	Weight	17.6 Ib (8 kg)
	Power source	120V AC ± 15%, 60 Hz
	Power	Stand-by 7.7 W
	consumption
		Operating 28 W (max.)
	Working	32 °F to 104 °F (0 °C to 40 °C)
	temperature
	Electronics	LSI (CPU) etc.
	Display	Operator display			7-segment display (10 positions)
		Customer display			7-segment display (7 positions)
	Printer	Type			One-station thermal printer
		Printing speed			Approx. 12 lines/second
		Printing capacity			24 digits each for receipt and jour-
					nal paper
		Other functions			Graphic logo printing function
					Logo message function
					Receipt (ON-OFF) function, com-
					pression printing function
	Paper roll	Width	: 2.25 ± 0.02 in (57.5 ± 0.5 mm)
		Max. diam. : 3.15 in (80 mm)
		Quality	: High quality (0.06 to 0.08 mm thickness)
	Cash drawer	4 slots for bill and 5 for coin denominations

3. KEYBOARD

1) KEYBOARD LAYOUT

Type

Normal keyboard

Key position

STD/MAX 53

Key pitch

19 (W) × 19 (H) mm

Key layout

Fixed type

2) KEY LIST

■Keyboard layout

CONV

@/FOR

•

CL

PLU

DEPT

DEPT

CLK#

TAX

AUTO

/SUB

#

SHIFT

A

F

K

P

U

X

RA

%1

7

8

9

20

24

28

32

TAX1

TAX2

4

8

12

16

SHIFT

SHIFT

B

G

L

Q

V

Y

RCPT

%2

4

5

6

19

23

27

31

CHK

CH

/PO

3

7

11 M

15

–

NUMBER

C

H

R

W

Z

VOID RFND

1

2

3

18

22

26

30

MDSE

#/TM

2

6

10

14

DC

SHIFT

D

I

N

S

SBTL

SBTL

ESC

0

00

17

21

25

29

CA/AT/NS

/HELP

1

E

5

J

9

O

13

T

BS

SPACE

Note: The small characters on the bottom or lower right in each key indicates functions or characters which can be used for character entries for text programming.

XE-A21S SPECIFICATIONS

– 1 –

■Key names

KEY TOP	DESCRIPTION
2	Paper feed key
RA	Received-on account key
RCPT/PO	Receipt print/Paid-out key
VOID	Void key
ESC/HELP	Escape key/Help key
CONV	Conversion key
%1, %2	Percent 1and 2 key
RFND	Refund key
-	Discount key
@/FOR	Multiplication key
•	Decimal point key
CL	Clear key
0-9,00	Numeric Keys
PLU/SUB	PLU/Sub-department key
DEPT#	Department code entry key
DEPT SHIFT	Department shift key
CLK#	Clerk code entry key
Dept1-32	Department keys
TAX	Tax key
Tax 1 SHIFT	Tax 1 shift key
Tax 2 SHIFT	Tax 2 shift key
AUTO	Automatic sequence key
CHK	Check key
CH	Charge key
MDSE SBTL	Merchandise subtotal key
#/TM/SBTL	Non-add code/Time display/Subtotal key
CA/AT/NS	Total/Amount tender/No Sale key

4. MODE SWITCH

1) LAYOUT

• Rotary type

Manager key (MA)

MA

OP		MA
OPX/Z	REG
	MGR
OFF	X1/Z1	Operator key (OP)
VOID	X2/Z2	OP
PGM

The mode switch can be operated by inserting one of the two supplied mode keys - manager (MA) and operator (OP) keys. These keys can be inserted or removed only in the “REG” or “OFF” position.

The mode switch has these settings:

OFF : This mode locks all register operations. (AC power turns off.) No change occurs to register data.

OP X/Z: To take individual clerk X or Z reports, and to take flash reports.

	It can be used to toggle receipt state “ON” and “OFF” by
	pressing he [RCPT/PO] key.
REG	: For entering sales.
PGM	: To program various items.

VOID	: Enters into the void mode. This mode allows correction after
	finalizing a transaction.
MGR	: For manager’s entries. The manager can use this mode for
	an override entry.

X1/Z1 : To take the X/Z report for various daily totals.

X2/Z2 : To take the X/Z report for periodic (weekly or monthly) consolidation.

5. DISPLAY

1) OPERATOR DISPLAY

Display device

: LED

Number of line

:

1 line

Number of positions: 10 positions

Color of display

: Yellow Green

Character form

:

7 segment + DP

Character size

: 14.2 (H) × 7.9 (W) mm

Layout:

0 . 1 . 2 . 3 . 4 . 5 . 6 . 7 . 8 . 9 .

2) CUSTOMER DISPLAY

Display device

: LED

Number of line

:

1 line

Number of positions: 7 positions

Color of display

: Yellow Green

Style

: Pop up type

Character form

: 7 segment + Dp

Character size

: 14.2mm (H) × 7.9mm (W)

Layout:

3 . 4 . 5 . 6 . 7 . 8 . 9 .

Operator display

Customer display

PLU/SUB

(Pop-up type)

DEPT REPEAT

Clerk code

RCPT

DC

SHIFT NUMBER

OFF

Amount: Appears in the far-right eight (max.) positions. When the amount is negative, the minus symbol “-” appears before the amount.

Number of repeats for repetitive registrations:

The number of repeats is displayed, starting at “2” and incremental with each repeat. When you have registered ten times, the display will show “0.” (2 3 3 ..... 9 3 0 3 1 3 2 ... )

Receipt function status:

The indicator “_” appears in the RCPT OFF position when the receipt function is in the OFF status.

Time : Appears in the far-right six positions (hour-minute - “” or hour-minute - “”) in the OP X/Z, REG, or MGR mode. “ ” is displayed in the morning (AM), and “” in the afternoon (PM). In the REG or MGR mode, press the [#/TM/SBTL] key to display the time.

XE-A21S SPECIFICATIONS

– 2 –

■Machine state symbols

: Appears during programming.

: Appears when an error is detected.

: Appears when the subtotal is displayed or when the amount tendered is smaller than the sales amount.

: Appears when the [CONV] key is pressed to calculate a subtotal in foreign currency.

Decimal Point

	Display	Description
	position
Decimal point	7-1
TAB	4-1
EJ near full	8, 9	(by PGM selection)

: Appears when a transaction is finalized by pressing the [CA/AT/ NS], [CHK] or [CH] key.

: Appears when the change due amount is displayed.

: May appear in the far-left three positions at the timing of key entry when the electronic journal (EJ) memory is full. (Depending on programming.)

: Appears when the voltage of the installed batteries is under the required level. You must replace with new ones within two days.

: Appears when the batteries are not installed, or the installed batteries are dead. You must replace with new ones immediately.

: May appear right below the eighth and ninth places at the timing of finalization of a transaction when the electronic journal (EJ) memory is nearly full.

Also appears right below the tenth place when power save mode is effective.

: Appears when the print roller arm is not locked.

: Appears when the paper is not set or has run out.

Segment

	Display		Description
	position
Amount	1-8
Minus sign	2-10	-	: Floating
Error	8-10	Exx : xx = error code
PGM Mode	10	P
CASH, CHECK,	10	F : Light up when a registration is
CHARGE			f i n a l i ze d by d e p r e s s i n g
			[CASH], [CHECK], [CHARGE]
			key
SUB TOTAL/	10	o
short tender
Change	10	C : Light up whenever the change
			due amount appears in the dis-
			play.
Currency	10	c : Light up whenever the foreign
Conversion			amount appears in the display.
Department	9-10	No zero-suppressed
PLU	7-10	No zero-suppressed
Repeat	8	Endless count, starting from 2.
Receipt OFF	9	_
DC		_	: Double size character entry
			status
SHIFT		_	: Shift character entry status
NUMBER		_	: Number character entry status
Clerk No.	2, 3	-xx- : clerk number
EJ FULL	8-10	E-E : Light up when EJ memory is
			FULL at the timing of key entry
			(by PGM selection).
Low Battery	10	L	:
No Battery	10		:

6. PRINTER

1) Printer

• Part number	: M-T53II
• NO. of station	: 1 (Receipt or journal)
• Validation	: No.
• Printing system	: Line thermal
• No. of dot	: 288 dots
• Dot pitch	: Horizontal		0.167mm
	Vertical		0.174mm
• Font	: 10 dots (W) × 24 dots (H)
• Printing capacity	: max. 24 characters
• Character size	: 1.67mm (W) × 4.17mm (H) at 10 × 24 dots
• Print pitch	: Column distance		2.0mm
	Row distance		5.21mm
• Max. Print speed	: Approximate 60mm/s (Approximate 12 l/s)
• Max. Paper feed speed: Approximate 60mm/s (Approximate 12 l/s)
(Manual feed)	: Approximate 40mm/s (Approximate 12 l/s)
• Reliability	: Mechanism LIFE 6 million lines used to
	high-quality thermal paper
• Paper end sensor	: Set up
• Cutter	: No
• Near end sensor	: No
2) Paper
• Paper roll dimension:	57.5 ± 0.5mm in width
	Max. 80mm	in diameter
• Paper quality:	High-quality thermal paper
	paper thickness		: 0.06 to 0.08mm
	Nihon seisi thermal paper : TF50KS-E
	Oji thermal paper		: PD150R,
			PD160R

3) Logo stamp

• No

XE-A21S SPECIFICATIONS

– 3 –

4) PRINTING AREA

Number of thermal head heater elements 288 dots

(4.75)	48 (288 dots)	(4.75)
	print area
	(max.24 characters)
	0.167
	57.5±0.5	(units : mm)
	(Paper dimension)

7. DRAWER

[OUTLINE]

• Standard equipment	: Yes (1)
• Max. number of additional drawers: 1
• The drawer consists of	:

1)Drawer box (outer case) and drawer

2)Money case

3)Coin case

4)Lock (attached to the drawer)

[SPECIFICATION]

1) DRAWER BOX AND DRAWER

Model name of the drawer box	SJ415
Size	330(W) ×418(D) ×98(H) mm
Material	Plastic
Bell	—
Release lever	Standard equipment:
	situated at the bottom
Drawer open sensor	—
2)MONEY CASE
Separation from the drawer	Disallowed
Separation of the bill compart-	Allowed
ments from the coin compartments
Bill separator	—
Number of compartments	4B/5C

Layout:

3) Drawer Lock Key

This key locks and unlocks the drawer. To lock it, turn 90 degrees counterclockwise. To unlock it, turn 90 degrees clockwise.

8. USB PORT

[DEVICE]

USB B Type

[OUTLINE]

This ECR has 1 port.

This is used in order to connect with a personal computer.

[SPECIDICATIONS]

1) Transmission rate

USB 2.0 Full Speed Max. 12Mbps

2) Connector

USB B Type

3) Pin assign

1Pin 5V

2Pin −D

3Pin +D

4Pin GND

9. BATTERY

1) MEMORY BACK UP BATTERY

For memory back up, the dry battery AA (3 pieces) are needed.

1.Memory holding time:

Approximate 1 year after New dry batteries are inserted.

2.Battery exchange method:

When the low battery symbol “L” lights up, batteries (3 pieces) exhange by the following method, with 2 days.

1)Power on the ECR.

2)Mode switch turn to “REG” mode.

3)Release the OLD dry batteries (3 pieces).

4)Insert the NEW dry batteries (3 pieces).

5)Confirm the low battery symbol “L” lights off.

2) LOW BATTERY

Low battery indication will appear on the left side of display when the battery voltage is low.

CASE 1: When any numeric entry & any item entry is not done or just

after finalization.

4B/5C

The machine can indicate the low battery condition. (Always)

XE-A21S SPECIFICATIONS

– 4 –

CASE 2: When numeric entry or item entry is done.

Battery condition will not appear.

Exceptionally, when the power is restored after a power failure, the low battery condition will appear on the display only when the battery is low.

And the indicator will disappear after any key entry.

[Display sample]

“0.00”: Battery is OK.

“L 0.00”: Low battery (You have to change the batteries.)

“ 0.00”: No battery (You have to change the batteries immediately.)

After finalization

“F 12.34”: Battery is OK.

“L 12.34”: Low battery. (“L” indicate instead of “F”.)

“ 12.34”: No battery. (“L” indicate instead of “F”.)

Note: “NO BATTERY”: When the “NO BATTERY” is display, the master reset is executed at the timing of “POWER ON” after the “POWER OFF”.

10. SD MEMORY CARD

[Device]

SD Card (Version. 1.01)

[Outline]

XE-A21S has a SD Memory Card slot.

[Specidications]

1)	Variable clock rate	: 0 - 25 MHZ
2)	Other commands and memory access : 2.7 - 3.6V
3)	Bus Protocol	: SPI Bus
4)	Correspondence capacity	: 32MB - 512MB
5)	Recommended manufacturer	: SanDisk

CHAPTER 2. OPTIONS

1.	OPTIONS (NO)
2.	SERVICE OPTIONS (NO)
3.	SUPPLIES
	No.	NAME	PARTS CODE	PRICERANK	DESCRIPTION
	1	Thermal roll paper	TPAPR6656RC05	BA	5 ROLLS/PACK (70 φ)
4.	SPECIAL SERVICE TOOLS (NO)
	No.	NAME	PARTS CODE	PRICERANK	DESCRIPTION
	1	USB Cable

CHAPTER 3. MASTER RESET AND PROGRAM RESET

1. MASTER RESETTING

Master resetting clears the entire memory and resumes initial values. Master resetting can be accomplished by using the following procedure:

Procedure A: 1) Unplug the AC cord from the wall outlet or set the mode switch to OFF Position.

2)Let the ECR be without the memory back up battery.

3)Wait over 1 muinite for discharging.

4)Set the mode switch to any position except OFF.

5)Plugin the AC cord to the wall outlet or turn the mode switch from OFF Position to another position.

The master reset can also be accomplished in the following case.

In case power failure occurs when the machine has no battery attached to it, the master reset operation is automatically performed after the power has been restored.

(This is because if power failure occurs with no battery attached to the machine, all the memories are lost and the machine does not work properly after power recovery; this requires the master reset operation.)

2.PROGRAM RESETTING (INITIALIZATION)

This resetting resumes the initial program without clearing memory.

This resetting can be operated at below sequence in PGM mode.

Procedure: 1)	Unplug the AC cord from the wall outlet.
2)	Wait over 1 muinite for discharging.
3)	Set the mode switch to the PGM position.
4)	While holding down the FEED key, plugin the AC
	cord to the wall outlet.

Note: In case power failure occurs when the machine has no battery attached to it, the master reset operation is automatically performed after the power has been restored.

XE-A21S OPTIONS

– 5 –

CHAPTER 4. HARDWARE DESCRIPTION

1. HARDWARE BLOCK DIAGRAM

2. MEMORY MAP

POWER	DRY Battery
5.8V		BUZZER
5.0V
3.3V
7.9V
23.8V
12MHz	CPU		RESET IC
	Renesus
32.768kHz	M30624MWP-		LV125	SD CARD
	XXXFP		HCT04
DRAWER
	ROM 320KByte
	RAM 24KByte
Driver/Sensor			S-RAM
			128KByte
PRINTER
MT53II			USB	USB
			Controller	Type B
			M66291GP
MOTOR
	74H374		SEG
			Driver	LED
				Front 10
			DIG	PopUp 7
	Decoder
			Driver
	74HC138	2
	4 to 16		KEY SCAN	KEY
			KEY RETURN	SWITCH

<Main parts>

CPU	: M30624MWP-XXXFP (Renesus)
	ROM 320KByte (MASK) RAM 24KByte
External RAM	: 1Mbit (128K × 8)
	CYPRESS CY62128BLL-70SXI
Printer	: MT53II (EPSON)
USB controller	: M66291GP (Renesus)

1MByte mode/The CS area PM13 = 1 is selected.

CPU internal RAM	: 24KByte 00400h-063FFh
External RAM	: 128KByte 08000h-27000h
	(Area that can be used 124KByte)

00000h

00400h CPU internal RAM 24KByte 00400h-063FFh

063FFh

06400h

08000h External RAM		/CS2
128KByte

27000h
28000h	USB controller		/CS1
30000h	Segment Latch Address		/CS0

80000h

B0000h CPU internal MASK ROM 320KByte B0000h-FFFFFh

FFFFFh

XE-A21S HARDWARE DESCRIPTION

– 6 –

3. CPU PORT

Port	Pin No.	Pin name	Signal name	I/O	Initial value	Off mode	Function
P00	88	D0	D0	I/O	H	Out L	DATE BUS D0
P01	87	D1	D1	I/O	H	Out L	DATE BUS D1
P02	86	D2	D2	I/O	H	Out L	DATE BUS D2
P03	85	D3	D3	I/O	H	Out L	DATE BUS D3
P04	84	D4	D4	I/O	H	Out L	DATE BUS D4
P05	83	D5	D5	I/O	H	Out L	DATE BUS D5
P06	82	D6	D6	I/O	H	Out L	DATE BUS D6
P07	81	D7	D7	I/O	H	Out L	DATE BUS D7
P10	80	P10	KST0	O	L	In	KEY DISPLAY (4 TO 16)
P11	79	P11	KST1	O	L	In	KEY DISPLAY (4 TO 16)
P12	78	P12	KST2	O	L	In	KEY DISPLAY (4 TO 16)
P13	77	P13	KST3	O	L	In	KEY DISPLAY (4 TO 16)
P14	76	P14	IN2	O	L	Out L	PAPER FEED MOTOR
P15	75	P15	IN1	O	L	Out L	PAPER FEED MOTOR
P16	74	P16	ENA2	O	L	Out L	PAPER FEED MOTOR
P17	73	P17	ENA1	O	L	Out L	PAPER FEED MOTOR
P20	72	A0	A0	O	H	Out L	ADDRESS BUS A0
P21	71	A1	A1	O	H	Out L	ADDRESS BUS A1
P22	70	A2	A2	O	H	Out L	ADDRESS BUS A2
P23	69	A3	A3	O	H	Out L	ADDRESS BUS A3
P24	68	A4	A4	O	H	Out L	ADDRESS BUS A4
P25	67	A5	A5	O	H	Out L	ADDRESS BUS A5
P26	66	A6	A6	O	H	Out L	ADDRESS BUS A6
P27	65	A7	A7	O	H	Out L	ADDRESS BUS A7
P30	63	A8	A8	O	H	Out L	ADDRESS BUS A8
P31	61	A9	A9	O	H	Out L	ADDRESS BUS A9
P32	60	A10	A10	O	H	Out L	ADDRESS BUS A10
P33	59	A11	A11	O	H	Out L	ADDRESS BUS A11
P34	58	A12	A12	O	H	Out L	ADDRESS BUS A12
P35	57	A13	A13	O	H	Out L	ADDRESS BUS A13
P36	56	A14	A14	O	H	Out L	ADDRESS BUS A14
P37	55	A15	A15	O	H	Out L	ADDRESS BUS A15
P40	54	A16	A16	O	H	Out L	ADDRESS BUS A16
P41	53	A17	A17	O	H	Out L	ADDRESS BUS A17
P42	52	A18	A18	O	H	Out L	ADDRESS BUS A18
P43	51	A19	A19	O	H	Out L	ADDRESS BUS A19
P44	50	/CS0	/CS0	O	H	Out L	SEGMENT LATCH
P45	49	/CS1	/CS1	O	H	Out L	USB CONTROLLER
P46	48	/CS2	/CS2	O	H	Out H	SRAM
P47	47	/CS3	(NU)	O	L	Out L	UNUSED
P50	46	/WR	/WR	O	H	Out L	WRITE STROBE SIGNAL
P51	45	/BHE	(NU)	O	L	Out L	UNUSED
P52	44	/RD	/RD	O	H	Out L	READ STROBE SIGNAL
P53	43	BCLK	(NU)	O	L	Out L	UNUSED
P54	42	/HLDA	(NU)	O	L	Out L	UNUSED
P55	41	/HOLD	/EPM	I	-	In
P56	40	ALE	(NU)	O	L	Out L	UNUSED
P57	39	/RDY	/RDY	I	-	In	VCC PULLUP
P60	38	P60	DR1	O	L	Out L	DRAWER DRIVE SIGNAL
P61	37	P61	SD_CLK	O	H	Out L	SD CLK
P62	36	P62	SD_RXD	I	-	In	SD RXD
P63	35	P63	SD_TXD	O	H	Out L	SD TXD

XE-A21S HARDWARE DESCRIPTION

– 7 –

Port	Pin No.	Pin name	Signal name	I/O	Initial value	Off mode	Function
P64	34	P64	SD_POWER#	O	H	Out L	SD POWER#
P65	33	P65	SD_CS#	O	H	Out L	SD CS#
P66	32	P66	SD_CD#	I	-	In	SD CD#
P67	31	P67	SD_WP#	I	-	In	SD WP#
P70	30	TXD2	DAT	O	L	Out L	PRINTER DATA OUT
P71	29	P71	(NU)	O	L	Out L	UNUSED
P72	28	CLK2	CLK	O	L	Out L	PRINTER CLOCK
P73	27	P73	(NU)	O	L	Out L	UNUSED
P74	26	P74	P74	I	-	In	MODEL JUDGMENT
P75	25	P75	P75	I	-	In	MODEL JUDGMENT
P76	24	P76	/RES_USB	O	L	Out L	USB RESET
P77	23	P77	/EPM CTRL	O	H	Out L	/EPM CONTROL SIGNAL WHEN IPL
P80	22	P80	BUZZER	O	L	Out L	BUZZER
P81	21	P81	MOTOR	O	L	Out L	PAPER TAKE UP MOTOR
P82	20	/INT0	POFF	I	-	In	POWER INTERRUPT
P83	19	/INT1	/DREQUSB	I	-	In	USB DMA REQUEST
P84	18	/INT2	/INTUSB	I	-	In	USB INTERRUPT
P85	17	/NMI	(NU)	I	-	In	UNUSED
P86	11	XCOUT	XCOUT	I	-	In	32.768kHz
P87	10	XCIN	XCIN	I	-	In	32.768kHz
P90	7	P90	P90	I	-	In	KEY IN
P91	6	P91	P91	I	-	In	KEY IN
P92	5	P92	P92	I	-	In	KEY IN
P93	4	P93	P93	I	-	In	KEY IN
P94	3	P94	P94	I	-	In	KEY IN
P95	2	P95	P95	I	-	In	KEY IN
P96	1	P96	P96	I	-	In	KEY IN
P97	100	P97	P97	I	-	In	KEY IN
P100	97	AN0	P100	I	-	In	HEAD TEMPERATURE MONITOR
P101	95	AN1	P101	I	-	In	HEAD VOLTAGE MONITOR
P102	94	P102	/STB2	O	H	In	PRINTER/STB2
P103	93	AN3	VBAT	I	-	In	BATTERY VOLTAGE
P104	92	P104	(NU)	O	L	Out L	UNUSED
P105	91	P105	VPON	O	L	Out L	PRINTER HEAD POWER
P106	90	P106	/LAT	O	H	Out L	PRINTER DATA LATCH
P107	89	P107	/STB1	O	H	In	PRINTER/STB1
BYTE	8	BYTE		I	-	In	CONNECTED TO VDD
CNVss	9	CNVss		I	-	In	NOMAL: L / BOOT: H
/RESET	12	/RESET		I	-	In	RESET
Xout	13	Xout		O		Out	CLOCK
Vss	14	Vss		power			CONNECTED TO GND
Xin	15	Xin		I		In	CLOCK
Vcc	16	Vcc		power			CONNECTED TO VDD
Vcc	62	Vcc		power			CONNECTED TO VDD
Vss	64	Vss		power			CONNECTED TO GND
AVss	96	AVss		power			CONNECTED TO GND
Vref	98	Vref		ref			CONNECTED TO VDD
AVcc	99	AVcc		power			CONNECTED TO VDD

XE-A21S HARDWARE DESCRIPTION

– 8 –

4. USB PORT

One port for USB Port (Slave) is provided as a standard provision of XE-A21S.

The Renesus-make USB general-use ASSP device M66291 is used. The M66291 is mapped to the /CS1 area 28000h-29FFFh.

	CPU	M66291
	A0	D15/AD0
	A1-A6	AD1-AD6	VBuss
	D0-D7	D0-D7	TrON	1.5k
					1
	/CS1	CS				Vbus
			D+		3
	/RD	RD				D+
				27	2
	/WR	LWR	D−
					4	D−
	/RESUSB	/RESET		27
						GND
	/DREQUSB	/Dreq0		1.0 F
	/INTUSB	/INT0				USB
		HWR/BYTE
						CONN-
						ECTOR
		24MHz
	<CPU PORT>

No.	CPU port	Use signal	Purpose
19	P83 (INT1)	/DREQUSB	USB DMA channel 0 DMA request
			signal
18	P84 (INT2)	/INTUSB	USB interruption 0 request signal
24	P76 (TA3OUT)	/RESUSB	M66291 Reset control

5. SD CARD I/F

One port for SD card I/F is provided as a standard provision of XE-A21S. Communication with the SD card is made in the SPI mode.

No.	CPU port	Use signal	Purpose
31	P67 (TXD1)	/SD_WP	SD card write protect detection signal
32	P66 (RXD1)	/SD_CD	SD card insertion detection signal
33	P65 (CLK1)	/SD_CS	SD card chip select signal
34	P64 (CLKS1)	/SD_POW	SD card power on signal
35	P63 (TXD0)	SD_TXD	TxD signal
36	P62 (RXD0)	SD_RXD	RxD signal
37	P61 (CLK0)	SD_CLK	Serial CLK signal

6. PRINTER CONTROL

6-1. STEPPING MOTOR CONTROL

The two-phase bi-polar stepping motor is driven at a constant voltage. 1step: 0.087mm, 1dot: 2step

<CPU PORT>

Pin No.	CPU port	Use signal	Function
76	P14	IN2	Paper feed motor (IN2)
75	P15	IN1	Paper feed motor (IN1)
74	P16	ENA2	Paper feed motor (ENA2)
73	P17	ENA1	Paper feed motor (ENA1)

<DRIVE STEP>

	Driver IC input (CPU output)					Motor drive signal
STEP	IN1	IN2	ENA1	ENA2	A	B	/A	/B
					(OUT1)	(OUT3)	(OUT2)	(OUT4)
1	L	L	H	H	H	H	L	L
2	H	L	H	H	L	H	H	L
3	H	H	H	H	L	L	H	H
4	L	H	H	H	H	L	L	H

6-2. HEAD CONTROL

HEAD: All 288dot, Width 0.167mm/dot (6dot/mm)

<CPU PORT>

Pin No.	CPU port	Use signal	Function
89	P107	STRB1#	Printer STB1#
94	P102	STRB2#	Printer STB2#
30	P70	DAT	Printer print data
28	P72	PCLK	Printer forwarding clock
90	P106	LATCH#	Printer data latch
91	P105	VPON	Printer head motor power

6-3. PAPER TAKE UP MOTOR CONTROL

<CPU PORT>

Pin No.	Port	Use signal	Function
21	P81	MOTOR	Printer paper take up motor

6-4. OUT OF PAPER DETECTION

<CPU PORT>

Pin No.	Port	Strobe signal	Function
6	P91	/S4	Printer out of paper detection
			(It reads according to the timing of /S4)

6-5. PLATEN OPEN (HEAD UP DETECTION)

<CPU PORT>

Pin No.	Port	Strobe signal	Function
6	P91	/S3	Platen open detection
			(It reads according to the timing of /S3)

7. A/D CONVERSION

The following three signals are inputted to the A/D conversion port.

<CPU PORT>

	PIN	Port	Use	Function
	No.		signal
	97	AN0/P100	TM	Printer head temperature monitor
	95	AN1/P101	VPTEST	Printer head voltage monitor
	93	AN3/P103	VBAT	Battery voltage monitor

XE-A21S HARDWARE DESCRIPTION

– 9 –