m5m51016btp Renesas Electronics Corporation., m5m51016btp Datasheet - Page 322

• Manufacturer Part Number: m5m51016btp
• Description: Renesas 16-bit Single-chip Microcomputer M16c Family / M16c/20 Series
• Manufacturer: Renesas Electronics Corporation.

M30245 Group
Rev.2.00 Oct 16, 2006
REJ09B0340-0200
Figure 3.6.2. Setting routine (1) of DMA transfer from RAM to UART using SFR snooping function
b23
b23
b7
b7
b7
b7
0
(See “2.3.2 Operation of Serial I/O (transmission in clock synchronous serial I/O mode” for detail.)
Setting source pointer(internal RAM address) and destination pointer (UART1 transmit buffer)
Setting DMA0 control register
Disable DMA0
Enable UART1 transmit
Setting DMA0 cause select register
Initialization of UART1
b19
b19
0
0 0 0 0
0 0 0 0
1
0
b16
b16
0
0
1
page 313 of 354
b15
b15
0
1
0
1
04
03
16
16
1
b0
1
b0
b0
b0
0
DMA0 cause select register
DM0SL [Address 03B8
b8 b7
b8 b7
UART1 transmit / receive control register 1
U1C1 [Address 036D
DMA0 control register
DM0CON
DMA0 control register
DM0CON
DMA request cause select bits
Nothing is assigned. Write “0” when writing to these bits.
Software DMA request bit
Transmit enable bit
Transfer unit select bit
Repeat transfer mode select bit
DMA request bit
DMA enable bit
Source address direction select bit
Destination address direction select bit
DMA enable bit
0 1 1 1 0 : UART1 transmit
0 : Not occurred
1 : Transmit enable
1 : 8 bits
0 : Single transfer
0 : DMA not requested
0 : Disabled
1 : Forward
0 : Fixed
0 : Disabled
00
6A
Continued to the next page
16
16
b0
b0
[Address 002C
[Address 002C
Stores the address of UART1 transmit buffer register (036A
Nothing is assigned. Write “0” when writing to these bits.
Stores the internal RAM address (0400
Nothing is assigned. Write “0” when writing to these bits.
DMA0 source pointer
SAR0 [Address 0022
DMA0 destination pointer
DAR0 [Address 0026
16
16
]
]
16
16
]
]
16
16
to 0020
to 0024
3. CRC Snoop Function Applications
16
16
]
]
16
)
16
)