Datasheet

Rev.6.00 Oct.28.2004 page 439 of 1016
REJ09B0138-0600H
12.2.5 Timer Control/Status Registers 0 and 1 (TCSR0, TCSR1)
TCSR0
Bit:76543210
CMFB CMFA OVF ADTE OS3 OS2 OS1 OS0
Initial value : 0 0 0 0 0 0 0 0
R/W : R/(W)* R/(W)* R/(W)* R/W R/W R/W R/W R/W
TCSR1
Bit:76543210
CMFB CMFA OVF — OS3 OS2 OS1 OS0
Initial value : 0 0 0 1 0 0 0 0
R/W : R/(W)* R/(W)* R/(W)* — R/W R/W R/W R/W
Note: * Only 0 can be written to bits 7 to 5, to clear these flags.
TCSR0 and TCSR1 are 8-bit registers that display compare match and overflow statuses, and control compare match
output.
TCSR0 is initialized to H'00, and TCSR1 to H'10, by a reset and in hardware standby mode.
Bit 7—Compare Match Flag B (CMFB): Status flag indicating whether the values of TCNT and TCORB match.
Bit 7
CMFB Description
0 [Clearing conditions] (Initial value)
• Cleared by reading CMFB when CMFB = 1, then writing 0 to CMFB
• When DTC is activated by CMIB interrupt while DISEL bit of MRB in DTC is 0
1 [Setting condition]
Set when TCNT matches TCORB
Bit 6—Compare Match Flag A (CMFA): Status flag indicating whether the values of TCNT and TCORA match.
Bit 6
CMFA Description
0 [Clearing conditions] (Initial value)
• Cleared by reading CMFA when CMFA = 1, then writing 0 to CMFA
• When DTC is activated by CMIA interrupt while DISEL bit of MRB in DTC is 0
1 [Setting condition]
Set when TCNT matches TCORA