HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 238

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

Table 10.3 Register Configuration (cont)
Channel Name
4 (cont)
Notes: 1. Only the values of bits A27–A24 and A8–A0 are valid; bits A23–A9 are ignored. For
10.2
10.2.1
The timer start register (TSTR) is an eight-bit read/write register that starts and stops the timer
counters (TCNT) of channels 0–4. TSTR is initialized to H'E0 or H'60 upon reset or standby
mode.
Note: Undefined
• Bits 7–5 (reserved): Cannot be modified. Bit 7 is read as undefined. Bits 6 and 5 are always
224 HITACHI
read as 1. The write value to bit 7 should be 0 or 1, and the write value to bits 6 and 5 should
always be 1.
Initial value:
2. Write 0 to clear flags.
Bit name:
ITU Register Descriptions
Timer Start Register (TSTR)
Timer counter 4
General register A4
General register B4
Buffer register A4
Buffer register B4
details on the register addresses, see section 8.3.5, Description of Areas.
R/W:
Bit:
—
—
7
*
—
—
6
1
Abbrevi-
ation
TCNT4H
GRA4H
GRB4H
BRA4H
BRB4H
—
—
5
1
STR4
R/W
R/W
R/W
R/W
R/W
R/W
R/W
4
0
STR3
R/W
Initial
Value
H'00
H'FF
H'FF
H'FF
H'FF
3
0
STR2
R/W
2
0
Address*
H'5FFFF36
H'5FFFF37
H'5FFFF38
H'5FFFF39
H'5FFFF3A 8, 16, 32
H'5FFFF3B 8, 16, 32
H'5FFFF3C 8, 16, 32
H'5FFFF3D 8, 16, 32
H'5FFFF3E 8, 16, 32
H'5FFFF3F 8, 16, 32
STR1
R/W
1
0
1
Access
Size
8, 16
8, 16
8, 16, 32
8, 16, 32
STR0
R/W
0
0