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| 型号： | MAXQUSBJTAG-KIT# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | MAXQ USB JTAG EVAL BOARD |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | * |
CMAXQUSB User’s Guide
Connector P3
Connector P3 is a 20-pin, dual-row header that con-
nects to SMBus/I 2 C-based kits. The pinout is compati-
ble with Maxim ’s previous SMBus/I 2 C solution, the
MAXSMBus board. See Table 1.
If designing a custom EV kit board, beware: the
ground return system does not connect pin 20 .
Connector P4
Connector P4 is a 40-pin, dual-row header that con-
nects to SPI and 8-bit parallel kits. The pinout is com-
patible with Maxim ’s previous SPI solution, the
68HC16MODULE board. See Table 2.
GPIO pins K1–K8 and K1’–K15’ must be driven with a
4.7k ? or lower impedance source to turn around the
bidirectional level translators.
Table 1. Connector P3 Description
P3 PIN
1
2, 4, 5, 6, 8, 10,
12, 14, 16, 18, 19
3
7
9
11
13
15
17
20
LABEL
VDD
GND
SDA
SCL
K6
K1
K2
K3
K4
+12V*
FUNCTION
Power Supply. 2.5V, 3.3V, or 5V selected by CMAXQUSB VDD select jumper.
Ground Return
SMBus/I 2 C SDA (Data)
SMBus/I 2 C SCL (Clock)
General-Purpose I/O Designated as K6. Can be used for SMBus SUSPEND output.
General-Purpose I/O Designated as K1. Can be used for SMBus ALERT input.
General-Purpose I/O Designated as K2
General-Purpose I/O Designated as K3
General-Purpose I/O Designated as K4
Optional Unregulated Higher Voltage (7.5V to 16.5V) Power Supply. Enabled only if CMAXQUSB
jumper JU5 is installed and closed, and if external power is applied through connector P1.
*This +12V signal is provided only for legacy systems and is normally unpowered.
Table 2. Connector P4 Description
P4 PIN
1 –4
LABEL
GND
GPIO DESIGNATOR
—
Ground Return
FUNCTION
Optional Unregulated Higher Voltage (7.5V to 16.5V) Power Supply.
5, 6
+12V*
—
Enabled only if CMAXQUSB jumper JU5 is closed, and if external power
is applied through connector P1.
7, 8
9
10
11
12, 13, 14
15
16
17
18
19
VDD
RD
WR
CS0
—
A0
A1
A2
A3
D0
—
K13 when K0 = 1
K14 when K0 = 1
K15 when K0 = 1
—
K9 when K0 = 1
K10 when K0 = 1
K11 when K0 = 1
K12 when K0 = 1
K1 when K0 = 1
Power Supply. 2.5V, 3.3V, or 5V selected by CMAXQUSB VDD select
jumper.
Active-Low Read Strobe
Active-Low Write Strobe
Active-Low Memory Chip-Select Strobe
No Connection. Reserved for additional memory chip-select strobes.
Memory Address LSB
Memory Address
Memory Address
Memory Address MSB
Memory Data LSB
*This +12V signal is provided only for legacy systems and is normally unpowered.
5
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