External Signal Descriptions - Freescale Semiconductor MCF5329 Reference Manual

Chip Configuration Module (CCM)
lines. The available bus control signals include R/W, TS, TA, OE, and BE/BWE[3:0]. Up to six chip selects
can be programmed to select and control external devices and to provide bus cycle termination.
9.2

External Signal Descriptions

Table 9-1 provides an overview of the CCM signals.
Name
RCON
D[9:86:1]
9.2.1 RCON
If the external RCON pin is asserted during reset, then various chip functions, including the reset
configuration pin functions after reset, are configured according to the levels driven onto the external data
pins (see Section 9.4, "Functional
the levels on the external configuration pins to allow for module configuration.
9.2.2 D[9:86:1] (Reset Configuration Override)
If the external RCON pin is asserted during reset, then the states of these data pins during reset determine
the chip mode of operation, boot device, clock mode, and certain module configurations after reset.
It is recommended that the logic levels for reset configuration on D[9:86:1]
be actively driven when RCON is used. The rest of the data bus should be
allowed to float or be pulled high.
9.3 Memory Map/Register Definition
The CCM programming model consists of the registers listed in the below table.
Address
0xFC0A_0004 Chip Configuration Register (CCR)
0xFC0A_0008 Reset Configuration Register (RCON)
0xFC0A_000A Chip Identification Register (CIR)
0xFC0A_0010 Miscellaneous Control Register (MISCCR)
0xFC0A_0012 Clock Divider Register (CDR)
9-2
Table 9-1. Signal Properties
Function
Reset configuration select
Reset configuration override pins
Description"). The internal configuration signals are driven to reflect
NOTE
Table 9-2. CCM Memory Map
Register
Supervisor Access Only Registers
MCF5329 Reference Manual, Rev 3
Reset State
Internal weak pull-up device
—
Width
Access Reset Value
(bits)
1
16 R See Section
16 R 0x0001
16 R See Section
16 R/W See Section
16 R/W 0x0001
Freescale Semiconductor
Section/Page
9.3.1/9-3
9.3.2/9-4
9.3.3/9-4
9.3.4/9-5
9.3.5/9-6