20-101-0542 Rabbit Semiconductor, 20-101-0542 Datasheet - Page 34

• Manufacturer Part Number: 20-101-0542
• Description: CABLE 1.27MM FOR RCM3200
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0542

• Accessory Type: Programming Cable
• Product: Microcontroller Accessories
• For Use With/related Products: Rabbit 3000-based products, except RCM30/3100, LP3500
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 20-101-0542; 316-1180

Notes
1. When using pins 33–34 on header J1 to drive LEDs, you must use an external buffer to
2. The VRAM voltage is temperature-dependent. If the VRAM voltage drops below about
Locations R45, R46, R53, R57, and R74 allow the population of 0 Ω resistors (jumpers)
that will be used to enable future options. These locations are currently unused.
28
drive these external LEDs. These pins are not connected on the RCM3220, which does
not have the LEDs installed.
1.2 V to 1.5 V, the contents of the battery-backed SRAM may be lost. If VRAM drops
below 1.0 V, the 32 kHz oscillator could stop running. Pay careful attention to this volt-
age if you draw any current from this pin.
Pin
20
21
22
23
24
25
26–27
28
29
30
31
32
33
34
PG7
PG6
PG5
PG4
/IOWR
/IORD
SMODE0,
SMODE1
/RESET_IN
VRAM
VBAT_EXT
+3.3V
GND
n.c.
GND
Pin Name
Table 2. RCM3200 Pinout Configurations (continued)
Input/Output
Input/Output
Input/Output
Input/Output
Output
Output
(0,0)—start executing at address zero
(0,1)—cold boot from slave port
(1,0)—cold boot from clocked Serial Port A
SMODE0 =1, SMODE1 = 1
Cold boot from asynchronous Serial Port A at
2400 bps (programming cable connected)
Input
Output
3 V battery Input
Input
Default Use
RXE
TXE
RCLKE
TCLKE
Alternate Use
Serial Clock E input
Serial Clock E ouput
External write strobe
External read strobe
See Notes below table
Serial Port E
Also connected to
programming cable
Input to Reset Generator
Minimum battery
voltage 2.85 V
3.15–3.45 V DC
Reserved for future use
RabbitCore RCM3200
Notes