STA2500D datasheet(28/57 Pages) STMICROELECTRONICS

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General specification

STA2500D

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Doc ID 16067 Rev 1

Figure 3.

Active high clock request input and output combined with UART or SPI

●

Active low clock request input and output combined with UART:

Figure 4.

Active low clock request input and output combined with UART

●

Active low clock request input and output combined with SPI:

Figure 5.

Active low clock request input and output combined with SPI

The pins which are “not used” are available for alternate functions as described in

Section 7.5.

BT_CLK_REQ_OUT_1

BT_CLK_REQ_IN_1

Internal BT CLK Request

BT_CLK_REQ_IN_2

(*)

(*) BT_CLK_REQ_IN_1 and BT_CLK_REQ_IN_2 are used UNLESS one or both are re-programmed as alternate function(s) via Parameter File

(*)

NOT

BT_CLK_REQ_OUT_1

AND

BT_CLK_REQ_IN_1

Internal BT CLK Request

BT_CLK_REQ_IN_2

(*) BT_CLK_REQ_IN_1 and BT_CLK_REQ_IN_2 are used UNLESS one or both are re-programmed as alternate function(s) via Parameter File

(*)

NOT

BT_CLK_REQ_OUT_2

AND

BT_CLK_REQ_IN_1

Internal BT CLK Request

BT_CLK_REQ_IN_2

(*) BT_CLK_REQ_IN_1 and BT_CLK_REQ_IN_2 are used UNLESS one or both are re-programmed as alternate function(s) via Parameter File

(*)

NOT

Table 23.

Use of the BT_CLK_REQ_IN and BT_CLK_REQ_OUT signals in different modes

BT_CONFIG_1 BT_CONFIG_2 BT_CONFIG_3 Protocol

BT_CLK_

REQ_IN_1

BT_CLK_

REQ_IN_2

BT_CLK_R

EQ_OUT_1

BT_CLK_R

EQ_OUT_2

H4 UART

Active

high(1)

Active

low(1)

Active high

not used

H4 UART

Active

low(1)

Active

low(1)

Active low

not used

Enhanced

H4 SPI

Active high

Active low

Active high

Active low

BT_CLK_REQ_IN_1 and BT_CLK_REQ_IN_2 are used in the configuration logic, UNLESS one or both I/Os re-

programmed as alternate function(s) via the Parameter File.

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