RTE-V852-PC
USER’ S MANUAL (Rev. 1.10)
12
3.8. SWITCH 1 [SOCKET BOARD] (SW1)
SW1 on the Socket board is the switch used for setting the mode.
SW1 contact
1
2
3
4
Port
MODE
CKSEL
PLLSEL
P3MODE
SW1-to-Port Correspondence
MODE1:
Switch for specifying the operation mode of the V852.
OFF: Single chip mode
ON:
ROM-less mode (factory-set)
CKSEL:
Switch for specifying the CKSEL level of the V852.
OFF: Direct mode
ON:
PLL mode (factory-set)
PLLSEL:
Switch for specifying the PLLSEL level of the V852.
OFF:
×
5 (factory-set)
ON:
×
1
P3MODE:
Switch for specifying the mode used by P3 of the V852.
OFF: Connects P34, P36, and P37 to JPORT3. (factory-set)
ON:
Connects P34, P36, and P37 to J3 (RS-232C).
3.9. SWITCH 2 [SOCKET BOARD] (SW2)
SW2 on the Socket board is connected to CPU Port 0 and can be used freely by the user. When a
switch contact is OFF, it represents 1. When it is ON, it represents 0.
[Caution]
Set all of the switch contacts to OFF when the P0 terminal is to be used for other
purposes.
SW2 contact
1
2
3
4
5
6
7
8
Port
P00
P01
P02
P03
P04
P05
P06
P07
SW2-to-Port Correspondence
3.10. CRYSTAL SOCKET [SOCKET BOARD] (JP1)
JP1 has two roles. Namely, it is used to select the clock supplied to the CPU and also acts as the
connector for the crystal oscillator.
When an oscillator is connected to the OSC1 socket on the Base board:
Jumper pins 1 and 2 of JP1. Do not connect a crystal oscillator to JP1 in this case.
When a crystal oscillator is connected to JP1:
Connect the crystal oscillator across pins 1 and 3. Do not jumper pins 1 and 2.
