SIMM

單列直插式內存模塊（single in-line memory module，縮寫SIMM）是一種在20世紀80年代初到90年代後期在計算機中使用的包含隨機存取存儲器的內存模塊。它與現今最常見的雙列直插式內存模塊（DIMM）不同之處在於，SIMM模塊兩側的觸點是冗餘的。SIMM根據JEDEC JESD-21C標準進行了標準化。

大多數早期PC主板（基於8088的PC、XT、和早期AT）採用面向DRAM的插座式雙列直插封裝（DIP）晶元。隨著計算機內存容量的增長，內存模塊被用於節約主板空間和簡化內存擴展。相比插入八、九個DIP晶元，只需插入一個內存模塊就能增加計算機的內存。

30針SIMM內存模塊
針腳 #	名稱	信號說明	針腳 #	名稱	信號說明
1	V	+5 VDC	16	DQ4	Data 4
2	/CAS	Column Address Strobe	17	A8	Address 8
3	DQ0	Data0	18	A9	Address 9
4	A0	Address0	19	A10	Address 10
5	A1	Address1	20	DQ5	Data 5
6	DQ1	Data1	21	/WE	Write Enable
7	A2	Address2	22	V	Ground
8	A3	Address3	23	DQ6	Data 6
9	V	Ground	24	A11	Address 11
10	DQ2	Data2	25	DQ7	Data 7
11	A4	Address4	26	QP	Data parity out
12	A5	Address5	27	/RAS	Row Address Strobe
13	DQ3	Data3	28	/CASP	Parity Column Address Strobe
14	A6	Address6	29	DP	Data parity in
15	A7	Address7	30	V	+5 VDC

5 V 72針SIMM內存模塊
針腳 #	名稱	信號說明	針腳 #	名稱	信號說明
1	V	Ground	37	MDP1	Data Parity 1(MD8..15)
2	MD0	Data0	38	MDP3	Data Parity 3 (MD24..31)
3	MD16	Data16	39	V	Ground
4	MD1	Data1	40	/CAS0	Column Address Strobe 0
5	MD17	Data17	41	/CAS2	Column Address Strobe 2
6	MD2	Data2	42	/CAS3	Column Address Strobe 3
7	MD18	Data18	43	/CAS1	Column Address Strobe 1
8	MD3	Data3	44	/RAS0	Row Address Strobe 0
9	MD19	Data19	45	/RAS1	Row Address Strobe 1
10	V	+5 VDC	46	NC	Not Connected
11	NU [PD5]	Not Used [Presence Detect 5 (3v3)]	47	/WE	Read/Write Enable
12	MA0	Address 0	48	NC [/ECC]	Not Connected [ECC presence (if grounded) (3v3)]
13	MA1	Address 1	49	MD8	Data 8
14	MA2	Address 2	50	MD24	Data 24
15	MA3	Address 3	51	MD9	Data 9
16	MA4	Address 4	52	MD25	Data 25
17	MA5	Address 5	53	MD10	Data 10
18	MA6	Address 6	54	MD26	Data 26
19	MA10	Address10	55	MD11	Data 11
20	MD4	Data4	56	MD27	Data 27
21	MD20	Data20	57	MD12	Data 12
22	MD5	Data5	58	MD28	Data 28
23	MD21	Data21	59	V	+5 VDC
24	MD6	Data6	60	MD29	Data 29
25	MD22	Data22	61	MD13	Data 13
26	MD7	Data7	62	MD30	Data 30
27	MD23	Data23	63	MD14	Data 14
28	MA7	Address7	64	MD31	Data 31
29	MA11	Address11	65	MD15	Data 15
30	V	+5 VDC	66	NC [/EDO]	Not Connected [EDO presence (if grounded) (3v3)]
31	MA8	Address 8	67	PD1	Presence Detect 1
32	MA9	Address 9	68	PD2	Presence Detect 2
33	/RAS3	Row Address Strobe 3	69	PD3	Presence Detect 3
34	/RAS2	Row Address Strobe 2	70	PD4	Presence Detect 4
35	MDP2	Data Parity 2 (MD16..23)	71	NC [PD (ref)]	Not Connected [Presence Detect (ref) (3v3)]
36	MDP0	Data Parity 0 (MD0..7)	72	V	Ground

5V 64針Mac IIfx SIMM內存模塊
針腳 #	名稱	信號說明	針腳 #	名稱	信號說明
1	GND	Ground	33	Q4	Data output bus, bit 4
2	NC	Not connected	34	/W4	Write-enable input for RAM IC 4
3	+5V	+5volts	35	A8	Address bus, bit 8
4	+5V	+5volts	36	NC	Not connected
5	/CAS	Column address strobe	37	A9	Address bus, bit 9
6	D0	Data input bus, bit 0	38	A10	Address bus, bit 10
7	Q0	Data output bus, bit 0	39	A11	Address bus, bit 11
8	/W0	Write-enable input for RAM IC 0	40	D5	Data input bus, bit 5
9	A0	Address bus, bit 0	41	Q5	Data output bus, bit 5
10	NC	Not connected	42	/W5	Write-enable input for RAM IC 5
11	A1	Address bus, bit 1	43	NC	Not connected
12	D1	Data input bus, bit 1	44	NC	Not connected
13	Q1	Data output bus, bit 1	45	GND	Ground
14	/W1	Write-enable input for RAM IC 1	46	D6	Data input bus, bit 6
15	A2	Address bus, bit 2	47	Q6	Data output bus, bit 6
16	NC	Not connected	48	/W6	Write-enable input for RAM IC 6
17	A3	Address bus, bit 3	49	NC	Not connected
18	GND	Ground	50	D7	Data input bus, bit 7
19	GND	Ground	51	Q7	Data output bus, bit 7
20	D2	Data input bus, bit 2	52	/W7	Write-enable input for RAM IC 7
21	Q2	Data output bus, bit 2	53	/QB	Reserved (parity)
22	/W2	Write-enable input for RAM IC 2	54	NC	Not connected
23	A4	Address bus, bit 4	55	/RAS	Row address strobe
24	NC	Not connected	56	NC	Not connected
25	A5	Address bus, bit 5	57	NC	Not connected
26	D3	Data input bus, bit 3	58	Q	Parity-check output
27	Q3	Data output bus, bit 3	59	/WWP	Write wrong parity
28	/W3	Write-enable input for RAM IC 3	60	PDCI	Parity daisy-chain input
29	A6	Address bus, bit 6	61	+5V	+5volts
30	NC	Not connected	62	+5V	+5volts
31	A7	Address bus, bit 7	63	PDCO	Parity daisy-chain output
32	D4	Data input bus, bit 4	64	GND	Ground

SIMM

SIMM

30針SIMM

72針SIMM

專有SIMM

GVP64針

蘋果公司64針

HPLaserJet

參見

基本信息