RX610 Group
7. Clock Generation Circuit
R01UH0032EJ0120 Rev.1.20
Page 161 of 1006
Feb 20, 2013
Table 7.2 lists the input/output pins of the clock generation circuit.
Table 7.2 Pin Configuration
Pin Name
I/O
Description
XTAL
Input
These pins are used to connect a crystal resonator. The EXTAL pin can also be
used to input an external clock. For details, see section 7.3.2, External Clock
Input.
EXTAL
Input
BCLK
Output
This pin is used to supply external devices with the external bus clock (BCLK).
7.2
Register Descriptions
Table 7.3 shows the register of the clock generation circuit.
Table 7.3 Register of Clock Generation Circuit
Register Name
Symbol
Value after Reset
Address
Access Size
System clock control register
SCKCR
0202 0200h
0008 0020h
32