XA-C3 Datasheet, PDF (63/68 Pages) NXP Semiconductors – XA 16-bit microcontroller family 32K/1024 OTP CAN transport layer controller 1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID Filters, transport layer co-proce

Philips Semiconductors
XA 16-bit microcontroller family
32K/1024 OTP CAN transport layer controller
1 UART, 1 SPI Port, CAN 2.0B, 32 CAN ID filters, transport layer co-processor
xyFFFFh
Segment xy in Data
Memory Space
Preliminary specification
XA-C3
Object n
Buffer size
512 Bytes
Object n Message Buffer
XRAM
a23
a16 a15
a0
MBXSR[7:0]
MnBLR
a23
a16 a15
a8 a7
a0
MBXSR[7:0]
XRAMB[7:1] 0
00h
xy0000h
SU01342
Figure 45. Formation of the XRAM base address, with object n message buffer mapped to off–chip data memory.
xyFFFFh
Segment xy in Data
Memory Space
XRAM
512 Bytes
Object n
Buffer size
Object n Message Buffer
XRAM
a23
a16 a15
a0
MBXSR[7:0]
MnBLR
a23
a16 a15
a8 a7
a0
MBXSR[7:0]
XRAMB[7:1] 0
00h
xy0000h
Figure 46. Object n Message Buffer mapped into the on–chip XRAM.
SU01343
MBXSR (Message Buffer and XRAM Segment Register)
D Address: MMR Base + 291h
D Access: Read, write.
D Reset value: FFh
MBXSR
7
6
5
4
3
2
1
0
a23 – a16 of XRAM (and all message buffers) Base Address
XRAMB (XRAM Base Address)
D Address: MMR Base + 290h
D Access: Read, write
D Reset value: FEh
2000 Jan 25
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