R1610C RDC Semiconductor, R1610C Datasheet - Page 38

• Manufacturer Part Number: R1610C
• Description: High Performance 16 Bits MCU Integrated One 10/100M Mac Controller - 3.3V Operating Voltage/2.5V Core Voltage
• Manufacturer: RDC Semiconductor

R
11.
device. The chip selects are programmed through four peripheral control registers (A0h, A2h, A4h, and A8h) and all
the chip selects can insert wait states by programming the peripheral control registers.
FFFFFh), which is programmable. And the defaulted active memory range of UCS_n is 64k (F0000h – FFFFFh).
UCS_n will drive low within four SD_CLK cycles when active if no wait state is inserted. There are fifteen wait
states inserted to UCS_n active cycle on reset.
R
11.1
14-12
38
Register Offset:
Register Name:
Reset Value
11-4
1-0
15
Bit
15
1
3
2
D
Chip Select UNIT
D
The Chip Select Unit provides 12 programmable chip select pins to access a specific memory or peripheral
The UCS_n default is active on reset for Code access. The active memory range is upper 512k (80000h –
14
LB[2:0]
Name
R[1:0]
C
UCS_n
C
Rsvd
Rsvd
R3
R2
LB[2:0]
13
®
®
:
R
R
Attribute
I
I
S
S
C
C
A0h
Upper Memory Chip Select Register
F03Bh
D
D
R/W
R/W
R/W
R/W
12
RO
RO
S
S
P
P
C
C
o
o
m
m
m
m
u
u
11
n
n
0
i
i
c
c
Reserved.
LB[2:0], Memory block size selection for UCS_n chip select pin.
The active region of the UCS_n chip select pin can be configured by LB[2:0].
The default memory block size is from F0000h to FFFFFh.
LB2, LB1, LB0 ---- Memory Block size , Start address, End Address
1 ,
1 ,
1 ,
0 ,
Reserved
See Bit[1:0].
Ready Mode. This bit is used to configure the ready mode for the UCS_n chip
select.
Set 1: external ready is ignored.
Set 0: external ready is required.
Bit3, Bit 1-0: R3, R1-R0, Wait-State value. R1610C can insert wait states for an
access to the UCS_n memory cycle. The reset value for (R3, R1, R0) is (1, 1, 1).
R3, R1, R0 -- Wait States
0,
0,
a
a
t
t
i
i
o
o
n
n
10
0,
0,
0
1 ,
1 ,
0 ,
0 ,
0
1
1 ----
0 ---- 128k
0 ---- 256k
0 ---- 512k
9
0
--
--
8
0
64k
0
1
7
0
6
0
Description
5
1
, F0000h
, E0000h
, C0000h
, 80000h
4
1
Fast Ethernet RISC Processor
R3
3
, FFFFFh
, FFFFFh
, FFFFFh
, FFFFFh
R2
2
R1
1
R1610C
October 27, 2003
R0
0
Final Version 1.5
Data Sheet