UPD78F1502AGK-GAK-AX Datasheet, PDF (537/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 14 SERIAL ARRAY UNIT
Table 14-2. Selection of operation clock
SMRmn
Register
SPSm Register
Operation Clock (MCK) ^Note1
CKSmn PRS PRS PRS PRS PRS PRS PRS PRS
m13 m12 m11 m10 m03 m02 m01 m00
fCLK = 20 MHz
0
X
X
X
X
0
0
0
0
fCLK
20 MHz
X
X
X
X
0
0
0
1 fCLK/2
10 MHz
X
X
X
X
0
0
1
0
fCLK/2²
5 MHz
X
X
X
X
0
0
1
1
fCLK/2³
2.5 MHz
X
X
X
X
0
1
0
0
fCLK/2⁴
1.25 MHz
X
X
X
X
0
1
0
1
fCLK/2⁵
625 kHz
X
X
X
X
0
1
1
0
fCLK/2⁶
313 kHz
X
X
X
X
0
1
1
1
fCLK/2⁷
156 kHz
X
X
X
X
1
0
0
0
fCLK/2⁸
78.1 kHz
X
X
X
X
1
0
0
1
fCLK/2⁹
39.1 kHz
X
X
X
X
1
0
1
0
fCLK/2¹⁰
19.5 kHz
X
X
X
X
1
0
1
1
fCLK/2¹¹
9.77 kHz
X X X X 1 1 1 1 INTTM02 if m = 0,
INTTM03 if m = 1 ^Note2
1
0
0
0
0
X
X
X
X
fCLK
20 MHz
0
0
0
1
X
X
X
X fCLK/2
10 MHz
0
0
1
0
X
X
X
X
fCLK/2²
5 MHz
0
0
1
1
X
X
X
X
fCLK/2³
2.5 MHz
0
1
0
0
X
X
X
X
fCLK/2⁴
0
1
0
1
X
X
X
X
fCLK/2⁵
1.25 MHz
625 kHz
0
1
1
0
X
X
X
X
fCLK/2⁶
313 kHz
0
1
1
1
X
X
X
X
fCLK/2⁷
156 kHz
1
0
0
0
X
X
X
X
fCLK/2⁸
78.1 kHz
1
0
0
1
X
X
X
X
fCLK/2⁹
39.1 kHz
1
0
1
0
X
X
X
X
fCLK/2¹⁰
19.5 kHz
1
0
1
1
X
X
X
X
fCLK/2¹¹
9.77 kHz
1 1 1 1 X X X X INTTM02 if m = 0,
INTTM03 if m = 1 ^Note2
Other than above
Setting prohibited
Notes 1. When changing the clock selected for fCLK (by changing the system clock control register (CKC) value),
do so after having stopped (STm = 000FH) the operation of the serial array unit (SAUm). When
selecting INTTM02 and INTTM03 for the operation clock, also stop the timer array unit (TAU0) (TT0 =
00FFH).
2. SAUm can be operated at a fixed division ratio of the subsystem clock, regardless of the fCLK frequency
(main system clock, subsystem clock), by operating the interval timer for which fSUB/4 has been
selected as the count clock (setting TIS02 (if m = 0) or TIS03 (if m = 1) of the TIS0 register to 1) and
selecting INTTM02 and INTTM03 by using the SPSm register in channels 2 and 3 of TAU0. When
changing fCLK, however, SAUm and TAU0 must be stopped as described in Note 1 above.
Remarks 1. X: Don’t care
2. m: Unit number (m = 0, 1), n: Channel number (n = 0 to 2)
R01UH0004EJ0501 Rev.5.01
521
Jun 20, 2011