Renesas H8SX/1668R User Manual

Option Link Settings

Reference

Function

Fitted

Alternative (Removed)

Related To

R93 32.768

KHz

Clock Oscillator

Routes OSC1 CPU pin to J3 header OSC1 CPU pin and J3 header

are not connected

R94, R103,

R105

R94 32.768

KHz

Clock Oscillator

Routes OSC2 CPU pin to J3 header OSC2 CPU pin and J3 header

are not connected

R93, R103,

R105

R103 32.768

KHz

Clock Oscillator

On-board low-speed clock source

is used

External clock source is used

R93, R94, R104

R105 32.768

KHz

Clock Oscillator

On-board low-speed clock source

is used

External clock source is used

R94, R93, R103

R98 32.768

KHz

Clock Oscillator

Parallel resistor for a crystal

Not fitted

R99

12 MHz Clock

Oscillator

Routes EXTAL CPU pin to J3

header.

EXTAL CPU pin and J3 header

are not connected

R102, R101,

R100

R102

12 MHz Clock

Oscillator

Routes XTAL CPU pin to J3 and JA2

headers

XTAL CPU pin and J3 and JA2

headers are not connected

R99, R101,

R100

R101

12 MHz Clock

Oscillator

On-board main clock source is

used

External clock source is used

R99, R102

R100

12 MHz Clock

Oscillator

Parallel resistor for a crystal

Not fitted

Table 6-9: Clock configuration links.

Table 6-10 below describes the function of the option links associated with reference voltage source. The default configuration is indicated

by BOLD text.

Option Link Settings

Reference

Function

Fitted

Alternative (Removed)

Related To

R64 Voltage

Reference

Source

Voltage Reference set to

Board_ Vcc signal.

Voltage Reference taken from

external connector.

R83

R83 Voltage

Reference

Source

Voltage Reference is taken from

external connector.

Voltage Reference set to

Board_Vcc signal.

R64

Table 6-10: Voltage reference links.

Table 6-11 below describes the function of the option links associated with analog power supply. The default configuration is indicated by

BOLD text.