R01UH0823EJ0100 Rev.1.00
Page 1779 of 1823
Jul 31, 2019
RX23W Group
51. Electrical Characteristics
Note 1.
t
Pcyc
: PCLK cycle
Note 2.
t
cac
: CAC count clock source cycle
Note 3.
When the LOCO is selected as the clock output source (the CKOCR.CKOSEL[2:0] bits are 000b), set the clock output division ratio
selection to divided by 2 (the CKOCR.CKODIV[2:0] bits are 001b).
Note 4.
When the EXTAL external clock input or an oscillator is used with divided by 1 (the CKOCR.CKOSEL[2:0] bits are 010b and the
CKOCR.CKODIV[2:0] bits are 000b) to output from CLKOUT, the above should be satisfied with an input duty cycle of 45 to 55%.
Note 5.
The voltage for VCC_RF when CLKOUT_RF pin is to be used is between 3.0 V and 3.6 V.
CLKOUT_RF
CLKOUT_RF pin output cycle
t
CRFcyc
250
—
ns
CLKOUT_RF pin high pulse width
t
CRFH
100
—
ns
CLKOUT_RF pin low pulse width
t
CRFL
100
—
ns
CLKOUT_RF pin output rise time
t
CRFr
—
5
ns
CLKOUT_RF pin output fall time
t
CRFf
—
5
ns
Table 51.32
Timing of On-Chip Peripheral Modules (1)
Conditions: 1.8 V ≤ VCC = VCC_USB = AVCC0 = VCC_RF = AVCC_RF ≤ 3.6 V, VSS = AVSS0 = VSS_USB = VSS_RF = 0 V,
T
a
= –40 to +85°C
Item
Symbol
Min.
Max.
Unit
*1
Test
Conditions
