3069RF-ZTAT Datasheet, PDF (83/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

Bits 6 to 4—Standby Timer Select 2 to 0 (STS2 to STS0): These bits select the length of time
the CPU and on-chip supporting modules wait for the internal clock oscillator to settle when
software standby mode is exited by an external interrupt.
When using a crystal oscillator, set these bits so that the waiting time will be at least 7 ms at the
system clock rate.
For further information about waiting time selection, see section 20.4.3, Selection of Waiting
Time for Exit from Software Standby Mode.
Bit 6
STS2
0
0
0
0
1
1
1
1
Bit 5
STS1
0
0
1
1
0
0
1
1
Bit 4
STS0
0
1
0
1
0
1
0
1
Description
Waiting time = 8,192 states
Waiting time = 16,384 states
Waiting time = 32,768 states
Waiting time = 65,536 states
Waiting time = 131,072 states
Waiting time = 262,144 states
Waiting time = 1,024 states
Illegal setting
(Initial value)
Bit 3—User Bit Enable (UE): Selects whether to use the UI bit in the condition code register as a
user bit or an interrupt mask bit.
Bit 3
UE
0
1
Description
UI bit in CCR is used as an interrupt mask bit
UI bit in CCR is used as a user bit
(Initial value)
Bit 2—NMI Edge Select (NMIEG): Selects the valid edge of the NMI input.
Bit 2
NMIEG
0
1
Description
An interrupt is requested at the falling edge of NMI
An interrupt is requested at the rising edge of NMI
(Initial value)
Rev. 5.0, 09/04, page 61 of 978