z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 58

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 9. External Interface Control Register (EXTCT)
Table 10. External Chip Select Control Registers High (EXTCSxH)
PS022006-0207
External Interface Control Register Definitions
RESET
RESET
FIELD
ADDR
FIELD
ADDR
BITS
BITS
R/W
R/W
External Interface Control Register
Chip Select Control Registers
CSxEN
R/W
R/W
7
7
0
The following section describes the various control registers.
The external interface control register enables the interface and sets the internal memory
size (see
BUSSEL — Bus Select External Interface Enable
00 = No External Bus.
01 = 8-bit External Bus Interface is enabled (Port E).
1X = 16-bit External Bus Interface is enabled (Port J and Port E).
MEMSIZE — Select Internal Memory Size
00 = 128 KB of internal memory.
01 = 64 KB of internal memory.
10 = 32 KB of internal memory.
11 = No Internal Memory.
The chip select control registers control the chip select outputs. Each chip select has a
High byte and Low byte.
BUSSEL
00
POLSEL
Table
R/W
R/W
6
6
0
9).
FF_(E072, E074, E076, E078, E07A, E07C)H
CSxISA
R/W
R/W
5
5
0
MEMSIZE
P R E L I M I N A R Y
00
R/W
R/W
W/B
4
4
0
FF_E070H
R/W
R/W
3
3
0
R/W
R/W
2
2
0
RESERVED
RESERVED
0000
Product Specification
ZNEO
R/W
R/W
1
1
0
External Interface
™
Z16F Series
R/W
R/W
0
0
0
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