Datasheet

Section 17 Timer RE
Page 610 of 982 REJ09B0465-0300 Rev. 3.00
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
17.2.3 Timer RE Hour Data Register (TREHR)
Address:
Bit:
Value after reset:
b7
BSY
⎯
b6
⎯
0
b5
HR11
⎯
b4
HR10
⎯
b3
HR03
⎯
b2
HR02
⎯
b1
HR01
⎯
b0
HR00
⎯
H'FFFFAA
Bit Symbol Bit Name Description R/W
7 BSY Timer RE busy This bit is set to 1 when the timer RE is updating (calculating)
the values of second, minute, hour, and day-of-week data
registers. When this bit is 0, the values of second, minute,
hour, and day-of-week data registers must be adopted.
R
6 ⎯ Reserved This bit is read as 0. The write value should be 0. ⎯
5 HR11 R/W
4 HR10
Counting ten's
position of
hours
Counts on 0 to 2 for ten's position of hours
R/W
3 HR03 R/W
2 HR02 R/W
1 HR01 R/W
0 HR00
Counting one's
position of
hours
Counts on 0 to 9 once per hour. When a carry is generated, 1
is added to the ten's position.
R/W
TREHR is used in realtime clock mode and counts the BCD-coded hour value on the carry
generated once per hour by TREMIN. TREHR is incremented either from decimal 00 to 11 or 00
to 23 by the selection of the 12/24 bit in TRECR1. This register is not used in output-compare
mode.