Sharp JW-21MN manual Read free memory size, Monitor TMR, CNT, and MD, 10-4

10

[1] Read free memory size

Read free memory size.

[Write mode assignment]: None

[Communication format]

Command	"+"	"C"	"L"	"A"	CMD	SUB	ATTR
Response
	"+"	ACK	"C"	"L"	"A"	CMD	SUB		ATTR	MODE
Symbol	Data			Details
CMD	43(H)	Function code
SUB	4D(H)	Sub code
	03(H)	Program memory capacity: 3.5 k words						(Symbols other than the
M	07(H)	Program memory capacity: 7.5 k words						left: See page 10-3.)
	07(H)	Program memory capacity: 15.5 k words
	07(H)	Program memory capacity: 31.5 k words

Ex. When reading the amount of free program memory (up to 7.5 k words). The data in the cells are hexadecimal numbers.

Command	2B	43	4C	41	43	4D	00
	"+"	"C"	"L"	"A"	CMD	SUB	ATTR
Response
	2B	00	43	4D	41	43	4D	00	07
		ACK				CMD	SUB		7.5k word

[2] Monitor TMR, CNT, and MD

Read out the current value and attributed data from TMR, CNT, and MD in the specified area. [Write mode assignment]: None

[Communication format]

Command

"+"

"C"

"L"

"A"

CMD

SUB

ATTR

TMR.NO.

N

Response

"+"

ACK

"C"

"L"

"A"

CMD

SUB

ATTR

TMR.NO.

N

TA1

TAN

D1

DN

Symbol	Data	Details
CMD	42(H)	Function code
SUB	23(H)	Sub code
	When JW20/JW20H is
	used: 000 to 777(8)
		TMR, CNT, MD number
TMR NO	When JW30H is used:
	0000 to 7777(8)	(in order of 2 bytes data,
	(TMR, CNT, MD)	L and H.)
	1000 to 1777(8)
	(TMR, CNT)
		Number of reading data
N	0000 to 0100(8)	(in order of 2 bytes data,
		L and H.)
		Reading current value
D1 to DN	See the example	data
		(Data 2 bytes x number
		of reading data)

Symbol	Data		Details
	00(H)	Not used as TMR,
		CNT, or MD
	01(H)	ZW/JW MD
	02(H)	ZW CNT
	04(H)	ZW TMR
TA1	08(H)	DTMR (BCD)		Data 1 bytes
	09(H)	DTMR (BIN)		x
to
				Number of reading
TAN	0A(H)	UTMR (BCD)
				data
	0B(H)	UTMR (BIN)
	0C(H)	DCNT (BCD)
	0D(H)	DCNT (BIN)
	0E(H)	UCNT (BCD)
	0F(H)	UCNT (BIN)

(See page 10-3 for other symbols not described above)

[Ex.] Read the current value of TMR, CNT, and MD at addresses 000 to 002(8) (The data in cells are in hexadecimal notation)

Command	2B		43		4C		41	42		23		00	00	00	03	00
	"+"			"C"	"L"		"A"		CMD		SUB	ATTR	000(8)		3 pieces
Response	2B		00		43		4C	41		42		23	00	00	00	03	00
				ACK							CMD	SUB	ATTR	000(8)		3 pieces
	65			38	32		60		14		73	08	0C	0E
	No. 000				No. 001				No. 002			DTMR	DCNT	UCNT
	Current value:				Current value:				Current value:			000	001	002
		3865				6032		7314				(BCD)	(BCD)	(BCD)

10-4